diff --git a/Gemfile.lock b/Gemfile.lock
index cfbbaa6..404110f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,14 +38,14 @@ GEM
     multi_xml (0.6.0)
     multipart-post (2.1.1)
     mustermann (1.0.3)
-    nio4r (2.5.1)
+    nio4r (2.5.7)
     oauth2 (1.4.1)
       faraday (>= 0.8, < 0.16.0)
       jwt (>= 1.0, < 3.0)
       multi_json (~> 1.3)
       multi_xml (~> 0.5)
       rack (>= 1.2, < 3)
-    puma (4.1.0)
+    puma (4.3.5)
       nio4r (~> 2.0)
     rack (2.0.7)
     rack-protection (2.0.7)