diff --git a/.gitmodules b/.gitmodules
index 494cbd3..8782c73 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -6,7 +6,7 @@
 	url = https://github.com/SingleStepTests/65x02.git
 [submodule "modules/sm83"]
 	path = modules/sm83
-	url = https://github.com/SingleStepTests/sm83
+	url = https://github.com/SingleStepTests/sm83.git
 [submodule "modules/z80"]
 	path = modules/z80
 	url = https://github.com/SingleStepTests/z80.git