diff --git a/Gemfile.lock b/Gemfile.lock
index a28c385..3fc572d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -395,7 +395,7 @@ GEM
       racc
     pg (1.5.9)
     plek (5.2.0)
-    prometheus_exporter (2.1.1)
+    prometheus_exporter (2.2.0)
       webrick
     psych (5.2.1)
       date