diff --git a/1984/anonymous/README.md b/1984/anonymous/README.md
index ffbe3b7f6..172face11 100644
--- a/1984/anonymous/README.md
+++ b/1984/anonymous/README.md
@@ -14,7 +14,7 @@ make all
 ./anonymous
 ```
 
-### Alternate code:
+## Alternate code:
 
 The original version of this entry was added, by request,
 in order to show the code that was turned into the
diff --git a/1984/decot/README.md b/1984/decot/README.md
index c5995a3e5..738a946cd 100644
--- a/1984/decot/README.md
+++ b/1984/decot/README.md
@@ -14,7 +14,7 @@ make all
 ./decot
 ```
 
-### Alternate code:
+## Alternate code:
 
 This alternate code, the original, requires a compiler that supports
 `-traditional-cpp` or an old enough compiler. If you have such a compiler you
diff --git a/1984/mullender/README.md b/1984/mullender/README.md
index 697530b25..6223e5b65 100644
--- a/1984/mullender/README.md
+++ b/1984/mullender/README.md
@@ -25,7 +25,7 @@ correctly.  In later years, machine dependent code was discouraged. An alternate
 version that will work with other systems is provided as alternate code below.
 
 
-### Alternate code:
+## Alternate code:
 
 An alternate version exists which allows one to enjoy this entry on systems
 other than a [VAX-11](https://en.wikipedia.org/wiki/VAX-11) or
diff --git a/1985/sicherman/README.md b/1985/sicherman/README.md
index 7d5a6e398..3baa2165b 100644
--- a/1985/sicherman/README.md
+++ b/1985/sicherman/README.md
@@ -26,7 +26,7 @@ echo IOCCC | ./sicherman
 ./sicherman < sicherman.c | ./sicherman
 ```
 
-### Alternate code:
+## Alternate code:
 
 This alternate version, which is the original entry, requires either an old
 enough compiler or a compiler that supports `-traditional-cpp`. If you have such
diff --git a/1986/hague/README.md b/1986/hague/README.md
index b906f831e..c533579c4 100644
--- a/1986/hague/README.md
+++ b/1986/hague/README.md
@@ -35,7 +35,7 @@ Also try:
 echo IOCCC | ./hague 2>/dev/null
 ```
 
-### Alternate code:
+## Alternate code:
 
 Whereas with some entries the change to `fgets()` (see the [FAQ](/faq.md) for
 details on why this has been done) can be done in the original code this entry
diff --git a/1986/marshall/README.md b/1986/marshall/README.md
index 38df066a8..59b66588e 100644
--- a/1986/marshall/README.md
+++ b/1986/marshall/README.md
@@ -23,7 +23,7 @@ to read it for entertainment if nothing else.
 ./marshall
 ```
 
-### Alternate code:
+## Alternate code:
 
 As some changes had to be made due to the problem of conflicting compiler
 options briefly noted above we provide the code that demonstrates the problem so
diff --git a/1987/hines/README.md b/1987/hines/README.md
index ef8e08d9a..b7eebd829 100644
--- a/1987/hines/README.md
+++ b/1987/hines/README.md
@@ -21,7 +21,7 @@ make all
 ./hines hines.c
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry is in [hines.alt.c](hines.alt.c). With older
 compilers you can try the alt version:
diff --git a/1987/westley/README.md b/1987/westley/README.md
index 885619943..d0ee03792 100644
--- a/1987/westley/README.md
+++ b/1987/westley/README.md
@@ -16,7 +16,7 @@ make all
 ./westley
 ```
 
-### Alternate code:
+## Alternate code:
 
 If you have an older compiler you can try compiling the original source code
 which is true symmetry:
diff --git a/1988/applin/README.md b/1988/applin/README.md
index 4f019e961..a4abd5aa7 100644
--- a/1988/applin/README.md
+++ b/1988/applin/README.md
@@ -21,7 +21,7 @@ program.  See the [Alternate code](#alternate-code) section below for details.
 ./applin
 ```
 
-### Alternate code:
+## Alternate code:
 
 As noted above a smaller version can be used in case your `cpp` has a hard time
 with this entry.
diff --git a/1988/dale/README.md b/1988/dale/README.md
index 22b06c7b1..c219d1696 100644
--- a/1988/dale/README.md
+++ b/1988/dale/README.md
@@ -38,7 +38,7 @@ behaviour?
 ./dale "$(printf "the following files exist in this directory:\n%s\n" *)"
 ```
 
-### Alternate code:
+## Alternate code:
 
 If you have an old enough compiler you can try the original version in
 [dale.alt.c](dale.alt.c). To use:
diff --git a/1988/isaak/README.md b/1988/isaak/README.md
index 3972fda2b..9f0a4b973 100644
--- a/1988/isaak/README.md
+++ b/1988/isaak/README.md
@@ -19,7 +19,7 @@ code](#alternate-code) below.
 ./isaak
 ```
 
-### Alternate code:
+## Alternate code:
 
 The original version of this code is in [isaak.alt.c](isaak.alt.c).
 The original entry starts with the line:
diff --git a/1988/litmaath/README.md b/1988/litmaath/README.md
index cf4d3ac1c..51a0b0f23 100644
--- a/1988/litmaath/README.md
+++ b/1988/litmaath/README.md
@@ -24,7 +24,7 @@ code](#alternate-code) section below.
 ./litmaath eschew obfuscation
 ```
 
-### Alternate code:
+## Alternate code:
 
 
 This alternate code, added to help understand the entry and for fun, is code
diff --git a/1988/westley/README.md b/1988/westley/README.md
index 238d34451..eb478ccd3 100644
--- a/1988/westley/README.md
+++ b/1988/westley/README.md
@@ -55,7 +55,7 @@ You might enjoy looking at the output of:
 cc -E westley.alt.c
 ```
 
-### Alternate code:
+## Alternate code:
 
 To see if your compiler has the problem described above try:
 
diff --git a/1989/jar.1/README.md b/1989/jar.1/README.md
index b22cae424..88fd1743a 100644
--- a/1989/jar.1/README.md
+++ b/1989/jar.1/README.md
@@ -26,7 +26,7 @@ NOTE: this will run the program itself:
 make clobber all
 ```
 
-### Alternate code:
+## Alternate code:
 
 This code, which prints something slightly different, is provided as well.
 
diff --git a/1989/ovdluhe/README.md b/1989/ovdluhe/README.md
index f82a4e649..db6a83b04 100644
--- a/1989/ovdluhe/README.md
+++ b/1989/ovdluhe/README.md
@@ -35,7 +35,7 @@ by chance or is killed.
 ./ovdluhe < README.md
 ```
 
-### Alternate code:
+## Alternate code:
 
 The author suggested that one varies the definition of `P` from 2 through 10. As
 it's a `#define` it's easy to set up. To use try:
diff --git a/1989/paul/README.md b/1989/paul/README.md
index 5596cf923..703653815 100644
--- a/1989/paul/README.md
+++ b/1989/paul/README.md
@@ -18,7 +18,7 @@ out. See [alternate code](#alternate-code) below for more details.
 ./paul
 ```
 
-### Alternate code:
+## Alternate code:
 
 This version was described by the author like:
 
diff --git a/1989/tromp/README.md b/1989/tromp/README.md
index 6c1a78501..d1ed8060b 100644
--- a/1989/tromp/README.md
+++ b/1989/tromp/README.md
@@ -48,7 +48,7 @@ place and the winner is the
 loser](https://web.archive.org/web/20181023221954/https://www.chicagotribune.com/news/ct-xpm-2002-07-31-0207310310-story.html) :-)
 
 
-### Alternate code:
+## Alternate code:
 
 The author provided an alternate version of the code with some improvements. See
 the judges' additional remarks in the author's remarks, for more details.
diff --git a/1990/baruch/README.md b/1990/baruch/README.md
index 152009c92..06bb7ea74 100644
--- a/1990/baruch/README.md
+++ b/1990/baruch/README.md
@@ -30,7 +30,7 @@ echo 3 | ./baruch
 
 Why is there no output?
 
-### Alternate code:
+## Alternate code:
 
 This alternate code is for the [very few](https://en.wikipedia.org/wiki/0)
 [users](https://en.wikipedia.org/wiki/Microsoft_Windows)
diff --git a/1990/westley/README.md b/1990/westley/README.md
index 604d74e58..617ea0195 100644
--- a/1990/westley/README.md
+++ b/1990/westley/README.md
@@ -38,7 +38,7 @@ This program will enter an infinite loop if input is not a number > 0.
 ./westley 5
 ```
 
-### Alternate code:
+## Alternate code:
 
 If you have an old enough compiler try and to see how C has changed over the years:
 
diff --git a/1992/westley/README.md b/1992/westley/README.md
index efc92e301..8ac054392 100644
--- a/1992/westley/README.md
+++ b/1992/westley/README.md
@@ -39,7 +39,7 @@ show correctly!
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 The author provided a version for the US which we added. To build:
 
diff --git a/1993/lmfjyh/README.md b/1993/lmfjyh/README.md
index e67c3e44d..838a4da44 100644
--- a/1993/lmfjyh/README.md
+++ b/1993/lmfjyh/README.md
@@ -39,7 +39,7 @@ If you have gcc < 2.3.3 (i.e. the entry can compile):
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 To use:
 
diff --git a/1993/plummer/README.md b/1993/plummer/README.md
index 192932ac0..92fab4587 100644
--- a/1993/plummer/README.md
+++ b/1993/plummer/README.md
@@ -34,7 +34,7 @@ NOTE: an alternate version exists. See Alternate code section below.
 
 ```
 
-### Alternate code:
+## Alternate code:
 
 To use:
 
diff --git a/1993/rince/README.md b/1993/rince/README.md
index af3f9e7ba..d2b5da181 100644
--- a/1993/rince/README.md
+++ b/1993/rince/README.md
@@ -23,7 +23,7 @@ where:
 
 `[cabbage]` is a CABBAGE description file  (default: `rince.c`)
 
-### Alternate code: slowing down the game
+## Alternate code: slowing down the game
 
 Some people may want to slow down the game by increasing the
 value 17 in the lines:
diff --git a/1994/schnitzi/README.md b/1994/schnitzi/README.md
index 808112b26..42b6216a9 100644
--- a/1994/schnitzi/README.md
+++ b/1994/schnitzi/README.md
@@ -30,7 +30,7 @@ make all
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 To build the alternative code try:
 
diff --git a/1995/cdua/README.md b/1995/cdua/README.md
index 02da32d24..781ce5738 100644
--- a/1995/cdua/README.md
+++ b/1995/cdua/README.md
@@ -33,7 +33,7 @@ solving the maze. This is a feature, not a bug. See [bugs.md](/bugs.md) for more
 details.
 
 
-### Alternate code:
+## Alternate code:
 
 This version uses `usleep(3)` with the `Z` (defined in the Makefile, default
 `3000`) microseconds to make it easier to see the maze being solved in real
diff --git a/1995/garry/README.md b/1995/garry/README.md
index b35c52f5c..f07509e9e 100644
--- a/1995/garry/README.md
+++ b/1995/garry/README.md
@@ -28,7 +28,7 @@ make all
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 While it may not have been the intention of the author, the
 judges noted that the C pre-processed version (with the `#include`s
diff --git a/1995/vanschnitz/README.md b/1995/vanschnitz/README.md
index ae0106fb5..6262e5532 100644
--- a/1995/vanschnitz/README.md
+++ b/1995/vanschnitz/README.md
@@ -26,7 +26,7 @@ make clobber all LEVEL=6
 ./vanschnitz
 ```
 
-### Alternate code:
+## Alternate code:
 
 The authors provided a spoiler version of the program. Originally uuencoded we
 have decoded it for the wider audience in [spoiler.c](spoiler.c). The
diff --git a/1996/westley/README.md b/1996/westley/README.md
index d7c0af375..d18e33172 100644
--- a/1996/westley/README.md
+++ b/1996/westley/README.md
@@ -39,7 +39,7 @@ And for a good time, try:
 sh ./clock3
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [westley.alt.c](westley.alt.c), is provided.
 This version is the original code and does not contain the above mentioned
diff --git a/1998/dlowe/README.md b/1998/dlowe/README.md
index 1f7c87961..7c54c6a21 100644
--- a/1998/dlowe/README.md
+++ b/1998/dlowe/README.md
@@ -27,7 +27,7 @@ make all
 
 Why is there different output?
 
-### Alternate code:
+## Alternate code:
 
 NOTE: The original entry was just a text based pootifier.  To build
 that version try:
diff --git a/1998/schweikh1/README.md b/1998/schweikh1/README.md
index 37e9e65be..be4efe5d6 100644
--- a/1998/schweikh1/README.md
+++ b/1998/schweikh1/README.md
@@ -28,7 +28,7 @@ how to use it.
 NOTE: a limitation with the entry was that it required `gcc` but this limitation
 has been removed to make it more portable, requiring only `cc`.
 
-### Alternate code:
+## Alternate code:
 
 As noted above this entry will not work as it stands for macOS and there are
 some important notes as well as a description of how the fixed version works
diff --git a/2000/natori/README.md b/2000/natori/README.md
index 9af218cec..3a476a53b 100644
--- a/2000/natori/README.md
+++ b/2000/natori/README.md
@@ -27,7 +27,7 @@ Try modifying the code so that it will show another Moon phase based on input
 or else just by the code itself. Bonus points if you can make it show all!
 
 
-### Alternate code:
+## Alternate code:
 
 The author noted that those in the southern hemisphere might want to change
 `acos(l/2)` into `acos(-l/2)` which we have done in the alternate version.
diff --git a/2001/dgbeards/README.md b/2001/dgbeards/README.md
index e163140db..44d05209c 100644
--- a/2001/dgbeards/README.md
+++ b/2001/dgbeards/README.md
@@ -18,7 +18,7 @@ make
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 The author provided a way to speed it up a bit and also how to make it so it
 doesn't crash on losing.  The idea that it crashes on losing was too good to
diff --git a/2001/herrmann2/README.md b/2001/herrmann2/README.md
index 1fb126d00..0bd2d1695 100644
--- a/2001/herrmann2/README.md
+++ b/2001/herrmann2/README.md
@@ -73,7 +73,7 @@ diff herrmann2.alt.c herrmann2.orig.c && echo "output matches with original code
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 If you wish to use the original version that does not work for all platforms,
 you can make use of the [herrmann2.alt.c](herrmann2.alt.c) by running:
diff --git a/2001/kev/README.md b/2001/kev/README.md
index e3298afe9..46a483315 100644
--- a/2001/kev/README.md
+++ b/2001/kev/README.md
@@ -42,7 +42,7 @@ paddle. See below Alternate code.
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 To use:
 
diff --git a/2001/westley/README.md b/2001/westley/README.md
index baa4becbb..2a95f9eba 100644
--- a/2001/westley/README.md
+++ b/2001/westley/README.md
@@ -26,7 +26,7 @@ make
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [westley.alt.c](westley.alt.c), is provided.
 This alternate code might be less portable.
diff --git a/2004/arachnid/README.md b/2004/arachnid/README.md
index f5dd51399..e307ff8fc 100644
--- a/2004/arachnid/README.md
+++ b/2004/arachnid/README.md
@@ -36,7 +36,7 @@ QWERTY keyboards.  Rogue players, vi users, and Dvorak typists are
 invited to get lost (or use the alt version)!
 
 
-### Alternate code:
+## Alternate code:
 
 To use:
 
diff --git a/2004/gavare/README.md b/2004/gavare/README.md
index f5aa5541a..d1dae5ec1 100644
--- a/2004/gavare/README.md
+++ b/2004/gavare/README.md
@@ -22,7 +22,7 @@ make
 ./gavare > ioccc_ray.ppm
 ```
 
-### Alternate code:
+## Alternate code:
 
 The author provided [on their web page for the
 entry](https://gavare.se/ioccc/ioccc_gavare.c.html) an unobfuscated version that was used
diff --git a/2004/hoyle/README.md b/2004/hoyle/README.md
index a656b2b87..44b57664f 100644
--- a/2004/hoyle/README.md
+++ b/2004/hoyle/README.md
@@ -24,7 +24,7 @@ make
 ./hoyle 2 0 1 0 -0.001
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [hoyle.alt.c](hoyle.alt.c), is provided.
 This alternate code has a missing newline and used a non-standard tab stop size.
diff --git a/2004/kopczynski/README.md b/2004/kopczynski/README.md
index 0cd85bec2..8e175b4e5 100644
--- a/2004/kopczynski/README.md
+++ b/2004/kopczynski/README.md
@@ -42,7 +42,7 @@ What happens if you feed the program source to the program? Can you figure out
 why?
 
 
-### Alternate code:
+## Alternate code:
 
 The judges modified the program to print its result.  The original
 program returned the result as an exit code:
diff --git a/2005/mynx/README.md b/2005/mynx/README.md
index 5e33ec1cd..ebe692c76 100644
--- a/2005/mynx/README.md
+++ b/2005/mynx/README.md
@@ -33,7 +33,7 @@ Some have pointed out that this will not work for https initially
 for two reasons. For a starting point see the alternate code section below.
 
 
-### Alternate code:
+## Alternate code:
 
 As noted this will not work for https. This is because it does not scan for
 https but also a secure connection needs to be set up before http commands can
diff --git a/2005/vince/README.md b/2005/vince/README.md
index b031873b3..af64d1de8 100644
--- a/2005/vince/README.md
+++ b/2005/vince/README.md
@@ -29,7 +29,7 @@ another) while the X11 server is running.
 echo "Do or do not. There is no try."
 ```
 
-### Alternate code:
+## Alternate code:
 
 The [vince.alt.c](vince.alt.c) code of the submission will run on SGI IRIX and
 also has the recursive CPP macro (which sneaked in accidentally) removed.
diff --git a/2006/night/README.md b/2006/night/README.md
index 5cc288d00..7bdc22f3b 100644
--- a/2006/night/README.md
+++ b/2006/night/README.md
@@ -29,7 +29,7 @@ echo "Do or do not. There is no try."
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 To compile:
 
diff --git a/2011/vik/README.md b/2011/vik/README.md
index 8d90098ef..f5dd9e4ed 100644
--- a/2011/vik/README.md
+++ b/2011/vik/README.md
@@ -45,7 +45,7 @@ It is possible to download a number of Mod files from [The Mod
 Archive](http://modarchive.org).
 
 
-### Alternate code:
+## Alternate code:
 
 Assuming that `make` is similar enough try:
 
diff --git a/2012/endoh1/README.md b/2012/endoh1/README.md
index d349fe35e..8a252c879 100644
--- a/2012/endoh1/README.md
+++ b/2012/endoh1/README.md
@@ -32,7 +32,7 @@ this by default.
 
 
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, `endoh1.alt.c`, is provided.
 This alternate code is a de-obfuscated version of `endoh1.c`.
diff --git a/2012/kang/README.md b/2012/kang/README.md
index ca2f09ff6..404132bb4 100644
--- a/2012/kang/README.md
+++ b/2012/kang/README.md
@@ -34,7 +34,7 @@ echo "full spelling of an English cardinal numeral less than a quadrillion" | ./
 How does it have no `u` or `o` in a string in the source code and yet it gets
 `uno` right?
 
-### Alternate code:
+## Alternate code:
 
 This alternate code fixes the program that would throw off those who know German
 where the sound of 'V' is 'F' and so the program had the letter be 'F'. A
diff --git a/2012/konno/README.md b/2012/konno/README.md
index 80dbf1f7c..697fdae12 100644
--- a/2012/konno/README.md
+++ b/2012/konno/README.md
@@ -24,7 +24,7 @@ NOTE: N is an integer from 0 to 255.
 ./konno 30
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [konno.alt.c](konno.alt.c), is provided.
 This alternate code is an unobfuscated version of the winning code.
diff --git a/2012/vik/README.md b/2012/vik/README.md
index 2d7eba3ac..0b42676c7 100644
--- a/2012/vik/README.md
+++ b/2012/vik/README.md
@@ -67,7 +67,7 @@ fire](https://en.wikipedia.org/wiki/Halt_and_Catch_Fire_(computing)) :-)
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 For those few who might use Windows, To compile:
 
diff --git a/2012/zeitak/README.md b/2012/zeitak/README.md
index a020731ca..df83e090a 100644
--- a/2012/zeitak/README.md
+++ b/2012/zeitak/README.md
@@ -28,7 +28,7 @@ try [incorrect.c](incorrect.c) and the program itself.
 NOTE: it prints an error and exits on the first nesting error so it will not
 detect multiple issues!
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [zeitak.alt.c](zeitak.alt.c), is provided.
 The file [zeitak.alt.c](zeitak.alt.c) provides a version that has been slightly
diff --git a/2013/cable3/README.md b/2013/cable3/README.md
index 9a4df1b06..c2b1326aa 100644
--- a/2013/cable3/README.md
+++ b/2013/cable3/README.md
@@ -28,7 +28,7 @@ available. See the [Alternate code](#alternate-code) section below.
 
 NOTE: to quit the program type `QUITEMU`.
 
-### Alternate code:
+## Alternate code:
 
 An alternate version, which should compile in Windows, is provided. To use try:
 
diff --git a/2014/deak/README.md b/2014/deak/README.md
index 316bed685..6a5c3fdf0 100644
--- a/2014/deak/README.md
+++ b/2014/deak/README.md
@@ -27,7 +27,7 @@ compile. See [alternate code](#alternate-code) below.
 Try changing bounding box coordinates in the source to explore
 various regions of the fractal.
 
-### Alternate code:
+## Alternate code:
 
 The alternate code is included as [prog.alt.c](prog.alt.c) so you can more
 easily see the difference in what it might look like if the C was more
diff --git a/2014/vik/README.md b/2014/vik/README.md
index e1e175159..b53bba20f 100644
--- a/2014/vik/README.md
+++ b/2014/vik/README.md
@@ -31,7 +31,7 @@ echo 'Want to hear me beep?' | ./prog > audio_file.raw
 echo 'No. I want chocolate!' | ./prog | mplayer -demuxer rawaudio -
 ```
 
-### Alternate code:
+## Alternate code:
 
 The alternate code, [prog.alt.c](prog.alt.c), is based on the author's
 instructions on how to get it to work with Windows. This has not been tested but
diff --git a/2015/howe/README.md b/2015/howe/README.md
index 1c03f787e..b0e0ee329 100644
--- a/2015/howe/README.md
+++ b/2015/howe/README.md
@@ -44,7 +44,7 @@ cp war-and-peace.txt nuked.tmp
 ./avgtime.sh 100 ./prog war-and-peace.txt nuked.tmp
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, `prog.alt.c`, is provided.
 This alternate code does not use a 64 bit FNV hash.
diff --git a/2018/burton1/README.md b/2018/burton1/README.md
index 016c4d847..0d70cea7c 100644
--- a/2018/burton1/README.md
+++ b/2018/burton1/README.md
@@ -22,7 +22,7 @@ make
 ./prog < prog.c
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [prog.alt.c](prog.alt.c), is provided
 This alternate code was supposed to compile without warnings, however
diff --git a/2018/ciura/README.md b/2018/ciura/README.md
index 828159f52..3246c46bd 100644
--- a/2018/ciura/README.md
+++ b/2018/ciura/README.md
@@ -21,7 +21,7 @@ make
 ./prog < README.md
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, `prog.alt.c`, is provided.  As mentioned in
 the Author's remarks, the alternate version lacks a useful bug fix.
diff --git a/2018/ferguson/README.md b/2018/ferguson/README.md
index c935ba4c1..7bad9d175 100644
--- a/2018/ferguson/README.md
+++ b/2018/ferguson/README.md
@@ -28,7 +28,7 @@ make
 make test
 ```
 
-### Alternate code:
+## Alternate code:
 
 The author provided an alternate version which has a simpler keyboard for the
 monkey Eric. See his comments under the 'keyboards' section, briefly referred to
diff --git a/2019/ciura/README.md b/2019/ciura/README.md
index 7e59ff81f..36277137e 100644
--- a/2019/ciura/README.md
+++ b/2019/ciura/README.md
@@ -34,7 +34,7 @@ make
 ```
 
 
-### Alternate code:
+## Alternate code:
 
 There is an alternate version of this code that flushes stdout after writing a newline.
 See the Author's remarks for more information.
diff --git a/2019/duble/README.md b/2019/duble/README.md
index 6c8f92876..f9c544d4c 100644
--- a/2019/duble/README.md
+++ b/2019/duble/README.md
@@ -61,7 +61,7 @@ find . -name '.[A-Z]*' -delete
 
 though one might want to check that the program is not currently running. :-)
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [prog.alt.c](prog.alt.c), is provided.  This alternate
 code might not work as well on macOS.
diff --git a/2020/burton/README.md b/2020/burton/README.md
index 70bb52327..cebfae958 100644
--- a/2020/burton/README.md
+++ b/2020/burton/README.md
@@ -37,7 +37,7 @@ arg. It might also print strange output with more than one arg.
 ./prog 128 128 128 128
 ```
 
-### Alternate code:
+## Alternate code:
 
 By default, this code compiles for Little Endian machines.
 An alternate version is also compiled for Big Endian machines.
diff --git a/2020/endoh1/README.md b/2020/endoh1/README.md
index 11e224a4e..0ed3054df 100644
--- a/2020/endoh1/README.md
+++ b/2020/endoh1/README.md
@@ -29,7 +29,7 @@ make
 ./prog unwinnable.txt
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, [prog.alt.c](prog.alt.c), is provided.  This
 alternate code lacks the additional rule to flag all unprobed cells.  See the
diff --git a/2020/endoh3/README.md b/2020/endoh3/README.md
index cba158dc6..b756b0630 100644
--- a/2020/endoh3/README.md
+++ b/2020/endoh3/README.md
@@ -23,7 +23,7 @@ make
 # And watch closely for 15-20 seconds
 ```
 
-### Alternate code:
+## Alternate code:
 
 An alternate version of this entry, `prog.alt.c`, is provided.  This alternate code uses Unicode letters.
 
diff --git a/2020/kurdyukov1/README.md b/2020/kurdyukov1/README.md
index 0877d591f..c6ea54e22 100644
--- a/2020/kurdyukov1/README.md
+++ b/2020/kurdyukov1/README.md
@@ -25,7 +25,7 @@ echo IOCCC | ./prog
 ./prog < prog.x86_64.asm
 ```
 
-### Alternate code:
+## Alternate code:
 
 An even smaller alternate version of this entry, prog.alt.c, is provided.  This code does not contain any headers, nor any workaround for WIN32 based platforms.
 
diff --git a/2020/kurdyukov3/README.md b/2020/kurdyukov3/README.md
index 0b8b56cbb..a9641f51d 100644
--- a/2020/kurdyukov3/README.md
+++ b/2020/kurdyukov3/README.md
@@ -28,7 +28,7 @@ echo International Obfuscated C Code Contest | ./prog
 ./prog < input.txt
 ```
 
-### Alternate code:
+## Alternate code:
 
 There is an alternate version of this code in `prog.alt.c` where the main code is a macro.