diff --git a/src/types.h b/src/types.h
index 806e589..e69b489 100644
--- a/src/types.h
+++ b/src/types.h
@@ -32,8 +32,8 @@
 #include <Python.h>
 #include <git2.h>
 
-#if !(LIBGIT2_VER_MAJOR == 0 && LIBGIT2_VER_MINOR == 20)
-#error You need a compatible libgit2 version (v0.20.x)
+#if !(LIBGIT2_VER_MAJOR == 0 && LIBGIT2_VER_MINOR == 21)
+#error You need a compatible libgit2 version (v0.21.x)
 #endif
 
 /*