diff --git a/api/routes_app_installations.go b/api/routes_app_installations.go
index f76d7c2..ce95154 100644
--- a/api/routes_app_installations.go
+++ b/api/routes_app_installations.go
@@ -67,7 +67,7 @@ func (a *appInstallApi) handlerAppGetAccessToken(w http.ResponseWriter, r *http.
 		"exp": expirationTime,
 	}
 
-	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	token := jwt.NewWithClaims(jwt.SigningMethodRS256, claims)
 
 	signedToken, err := token.SignedString(privateKey)
 	if err != nil {