diff --git a/Cargo.toml b/Cargo.toml
index b91987e..6f5f8c6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,7 +26,7 @@ lazy_static = '1'
 log = '0.4'
 lru = '0.9'
 parking_lot = '0.12'
-riker = '0.4'
+riker = '0.4.2'
 riker-patterns = '0.4'
 serde_derive = '1.0'
 serde_json = '1.0'