diff --git a/Gemfile.lock b/Gemfile.lock
index 64fc55a..3828a23 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -218,7 +218,7 @@ GEM
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
-    minitest (5.23.0)
+    minitest (5.23.1)
     mutex_m (0.2.0)
     net-http (0.4.1)
       uri
@@ -240,9 +240,9 @@ GEM
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
     public_suffix (5.0.5)
-    racc (1.7.3)
+    racc (1.8.0)
     rb-fsevent (0.11.2)
-    rb-inotify (0.10.1)
+    rb-inotify (0.11.1)
       ffi (~> 1.0)
     rexml (3.2.8)
       strscan (>= 3.0.9)
@@ -257,8 +257,7 @@ GEM
     sawyer (0.9.2)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
-    simpleidn (0.2.2)
-      unf (~> 0.1.4)
+    simpleidn (0.2.3)
     strscan (3.1.0)
     terminal-table (1.8.0)
       unicode-display_width (~> 1.1, >= 1.1.1)
@@ -266,9 +265,6 @@ GEM
       ethon (>= 0.9.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
-    unf (0.1.4)
-      unf_ext
-    unf_ext (0.0.9.1)
     unicode-display_width (1.8.0)
     uri (0.13.0)
     webrick (1.8.1)