diff --git a/Gemfile.lock b/Gemfile.lock
index 1df85140..5fb235de 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -283,7 +283,7 @@ GEM
       ast (~> 2.4.1)
       racc
     pg (1.5.6)
-    prometheus_exporter (2.0.3)
+    prometheus_exporter (2.1.1)
       webrick
     psych (5.1.2)
       stringio