diff --git a/.gitmodules b/.gitmodules
index 0aaaa3d46..e0cc98cc9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -36,4 +36,4 @@
 	url = https://github.com/timbray/KeybaseLib.git
 [submodule "OpenKeychain/src/test/resources/extern/OpenPGP-Haskell"]
 	path = OpenKeychain/src/test/resources/extern/OpenPGP-Haskell
-	url = git://github.com/singpolyma/OpenPGP-Haskell.git
+	url = https://github.com/singpolyma/OpenPGP-Haskell.git