diff --git a/Makefile b/Makefile
index 65f3ad4..aef1b9d 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ default:
 
 .PHONY: check-shell-formatting
 check-shell-formatting:
-	shfmt --simplify --diff ci/* rust/ci/*
+	shfmt --simplify --diff ci/*.sh rust/ci/*.sh
 
 .PHONY: check-yaml-formatting
 check-yaml-formatting:
@@ -12,7 +12,7 @@ check-yaml-formatting:
 
 .PHONY: fix-shell-formatting
 fix-shell-formatting:
-	shfmt --simplify --write ci/* rust/ci/*
+	shfmt --simplify --write ci/*.sh rust/ci/*.sh
 
 .PHONY: fix-yaml-formatting
 fix-yaml-formatting:
diff --git a/rust/Makefile.jinja b/rust/Makefile.jinja
index 6546df3..0a98fe0 100644
--- a/rust/Makefile.jinja
+++ b/rust/Makefile.jinja
@@ -26,11 +26,11 @@ fix-rust-formatting:
 
 .PHONY: check-shell-formatting
 check-shell-formatting:
-	shfmt --simplify --diff ci/*
+	shfmt --simplify --diff ci/*.sh
 
 .PHONY: fix-shell-formatting
 fix-shell-formatting:
-	shfmt --simplify --write ci/*
+	shfmt --simplify --write ci/*.sh
 
 .PHONY: check-python-formatting
 check-python-formatting: