diff --git a/bin/install b/bin/install
index 77485ea..d213d1e 100755
--- a/bin/install
+++ b/bin/install
@@ -389,5 +389,5 @@ get_php_version() {
   fi
 }
 
-install_php $ASDF_INSTALL_TYPE $ASDF_INSTALL_VERSION $ASDF_INSTALL_PATH
-install_composer ${ASDF_INSTALL_PATH}
+install_php "$ASDF_INSTALL_TYPE" "$ASDF_INSTALL_VERSION" "$ASDF_INSTALL_PATH"
+install_composer "$ASDF_INSTALL_PATH"