diff --git a/1985/lycklama/README.md b/1985/lycklama/README.md
index c82e3f6b5..445b13e6c 100644
--- a/1985/lycklama/README.md
+++ b/1985/lycklama/README.md
@@ -56,7 +56,7 @@ which would set it at 700. Then, whether you use the default value or not, try:
 
 ```
 
-### Original code:
+## Original code:
 
 As explained above, because modern systems run this entry way too fast to fully
 appreciate what it does, we encourage you to first try the alternate version.
diff --git a/1996/eldby/README.md b/1996/eldby/README.md
index 636de3fce..c4558b33f 100644
--- a/1996/eldby/README.md
+++ b/1996/eldby/README.md
@@ -35,7 +35,7 @@ make CFLAGS+="-DZ=20000" clobber alt
 ./eldby.alt
 ```
 
-### Original code:
+## Original code:
 
 Besides the fact that modern systems make it impossible to see what this program
 does the rapid movement can be a problem for some people. It is for these
diff --git a/2006/sloane/README.md b/2006/sloane/README.md
index 874a36523..b3bf31300 100644
--- a/2006/sloane/README.md
+++ b/2006/sloane/README.md
@@ -41,7 +41,7 @@ make CDEFINE="-DS=0" clobber alt
 ./sloane.alt
 ```
 
-### Original code:
+## Original code:
 
 Should you wish to see the original without having to mess with the compiler
 line, try:
diff --git a/2013/birken/README.md b/2013/birken/README.md
index 9616c8fc1..e923ca224 100644
--- a/2013/birken/README.md
+++ b/2013/birken/README.md
@@ -51,7 +51,7 @@ If you wish to speed it up 200% you can use instead `-DZ=3750`. Doing this
 you might find the right value to your liking; use ctrl-c to terminate the
 program early.
 
-### Original code:
+## Original code:
 
 Should you wish to see the original without having to mess with the compiler
 line, try: