diff --git a/Gemfile.lock b/Gemfile.lock
index 1a70345..0bd3a11 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,7 +13,7 @@ GEM
     colored (1.2)
     ethon (0.10.1)
       ffi (>= 1.3.0)
-    ffi (1.9.23)
+    ffi (1.9.25)
     forwardable-extended (2.6.0)
     html-proofer (3.7.2)
       activesupport (>= 4.2, < 6.0)
@@ -36,14 +36,14 @@ GEM
       pathutil (~> 0.9)
       rouge (~> 1.7)
       safe_yaml (~> 1.0)
-    jekyll-feed (0.9.3)
+    jekyll-feed (0.11.0)
       jekyll (~> 3.3)
     jekyll-sass-converter (1.5.2)
       sass (~> 3.4)
     jekyll-watch (1.5.1)
       listen (~> 3.0)
     json (1.8.6)
-    kramdown (1.16.2)
+    kramdown (1.17.0)
     liquid (3.0.6)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
@@ -59,14 +59,14 @@ GEM
     parallel (1.12.0)
     pathutil (0.16.1)
       forwardable-extended (~> 2.6)
-    public_suffix (3.0.2)
+    public_suffix (3.0.3)
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
     rouge (1.11.1)
     ruby_dep (1.5.0)
     safe_yaml (1.0.4)
-    sass (3.5.6)
+    sass (3.5.7)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)