diff --git a/tools/mapmerge2/requirements.txt b/tools/mapmerge2/requirements.txt
index 095843b2d2a..8d77427c73f 100644
--- a/tools/mapmerge2/requirements.txt
+++ b/tools/mapmerge2/requirements.txt
@@ -1,3 +1,3 @@
-pygit2==0.26.0
+pygit2
 bidict==0.13.1
 Pillow==5.1.0