diff --git a/docs/geode-native-book-dotnet/Gemfile.lock b/docs/geode-native-book-dotnet/Gemfile.lock
index c02d2f7009..254abc29fb 100644
--- a/docs/geode-native-book-dotnet/Gemfile.lock
+++ b/docs/geode-native-book-dotnet/Gemfile.lock
@@ -176,7 +176,7 @@ GEM
     minitest (5.15.0)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    nio4r (2.5.8)
+    nio4r (2.5.9)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
     padrino-helpers (0.13.3.4)
@@ -187,7 +187,7 @@ GEM
       activesupport (>= 3.1)
     parallel (1.21.0)
     public_suffix (4.0.6)
-    puma (5.6.4)
+    puma (6.3.1)
       nio4r (~> 2.0)
     rack (1.6.13)
     rack-livereload (0.3.17)