diff --git a/includes/WPStrava/API.php b/includes/WPStrava/API.php
index 42ad021..c67c9cd 100755
--- a/includes/WPStrava/API.php
+++ b/includes/WPStrava/API.php
@@ -83,9 +83,9 @@ class WPStrava_API {
 	public function get( $uri, $args = null ) {
 
 		// @see https://stackoverflow.com/a/3764390/2146022
-		$arg_suffix = is_array( $args ) ? '_' . substr( md5( wp_json_encode( $args ), true ), 0, 12 ) : '';
+		$arg_suffix = is_array( $args ) ? '_' . substr( md5( wp_json_encode( $args ) ), 0, 12 ) : '';
 
-		$transient_key = 'strava_api_data_' . $uri . $arg_suffix;
+		$transient_key = 'strava_api_data_' . $this->client_id . '_' . $uri . $arg_suffix;
 
 		$data = get_transient( $transient_key );