diff --git a/.github/workflows/prepare_release.yml b/.github/workflows/prepare_release.yml
index 16c5f85..951471a 100644
--- a/.github/workflows/prepare_release.yml
+++ b/.github/workflows/prepare_release.yml
@@ -56,6 +56,7 @@ jobs:
             $new_version=@($major_ver, $minor_ver, $patch_ver) -Join "."
 
             # Update header file
+            $header = $header -replace "#define LIBDIVIDE_VERSION ""\d+\.\d+\.\d+""", "#define LIBDIVIDE_VERSION_MAJOR ""$new_version"""
             $header = $header -replace "#define LIBDIVIDE_VERSION_MAJOR \d+", "#define LIBDIVIDE_VERSION_MAJOR $major_ver"
             $header = $header -replace "#define LIBDIVIDE_VERSION_MINOR \d+", "#define LIBDIVIDE_VERSION_MINOR $minor_ver"
             $header = $header -replace "#define LIBDIVIDE_VERSION_PATCH \d+", "#define LIBDIVIDE_VERSION_PATCH $patch_ver"
@@ -77,7 +78,7 @@ jobs:
             Write-Output "patch=$patch_ver" >> $Env:GITHUB_OUTPUT
 
         # Commit all changed files back to the repository
-        - name: Checkout code
+        - name: Commit updated versions
           uses: stefanzweifel/git-auto-commit-action@v5
           with:
             commit_message: Auto increment version to ${{ steps.bump_version.outputs.version }}
diff --git a/libdivide.h b/libdivide.h
index b6d0e7b..6c1827c 100644
--- a/libdivide.h
+++ b/libdivide.h
@@ -11,12 +11,11 @@
 #ifndef LIBDIVIDE_H
 #define LIBDIVIDE_H
 
+// *** Version numbers are auto generated - do not edit ***
+#define LIBDIVIDE_VERSION "5.1.0"
 #define LIBDIVIDE_VERSION_MAJOR 5
 #define LIBDIVIDE_VERSION_MINOR 1
 #define LIBDIVIDE_VERSION_PATCH 0
-#define LIBDIVIDE_STR_INNER(s) #s
-#define LIBDIVIDE_STR(s) LIBDIVIDE_STR_INNER(s)
-#define LIBDIVIDE_VERSION (LIBDIVIDE_STR(LIBDIVIDE_VERSION_MAJOR) "." LIBDIVIDE_STR(LIBDIVIDE_VERSION_MINOR) "." LIBDIVIDE_STR(LIBDIVIDE_VERSION_PATCH))
 
 #include <stdint.h>