diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
old mode 100755
new mode 100644
index d982e64..b83ec72
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
       zeitwerk (~> 2.2)
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    bibtex-ruby (5.1.0)
+    bibtex-ruby (4.4.7)
       latex-decode (~> 0.0)
     citeproc (1.0.10)
       namae (~> 1.0)
@@ -41,8 +41,15 @@ GEM
     eventmachine (1.2.7-x64-mingw32)
     eventmachine (1.2.7-x86-mingw32)
     execjs (2.7.0)
-    faraday (1.0.0)
+    faraday (1.4.1)
+      faraday-excon (~> 1.1)
+      faraday-net_http (~> 1.0)
+      faraday-net_http_persistent (~> 1.1)
       multipart-post (>= 1.2, < 3)
+      ruby2_keywords (>= 0.0.4)
+    faraday-excon (1.1.0)
+    faraday-net_http (1.0.1)
+    faraday-net_http_persistent (1.1.0)
     ffi (1.12.2)
     ffi (1.12.2-java)
     ffi (1.12.2-x64-mingw32)
@@ -236,7 +243,7 @@ GEM
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
     kramdown (1.17.0)
-    latex-decode (0.3.1)
+    latex-decode (0.3.2)
     liquid (4.0.3)
     listen (3.2.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
@@ -244,7 +251,7 @@ GEM
     lumberjack (1.2.4)
     mercenary (0.3.6)
     method_source (0.9.2)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.1)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
@@ -254,17 +261,19 @@ GEM
     multipart-post (2.1.1)
     namae (1.0.1)
     nenv (0.3.0)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.9-java)
-    nokogiri (1.10.9-x64-mingw32)
-      mini_portile2 (~> 2.4.0)
-    nokogiri (1.10.9-x86-mingw32)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.5)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
+    nokogiri (1.11.5-java)
+      racc (~> 1.4)
+    nokogiri (1.11.5-x64-mingw32)
+      racc (~> 1.4)
+    nokogiri (1.11.5-x86-mingw32)
+      racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)
       shellany (~> 0.0)
-    octokit (4.17.0)
+    octokit (4.21.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
     pathutil (0.16.2)
@@ -277,12 +286,15 @@ GEM
       method_source (~> 0.9.0)
       spoon (~> 0.0)
     public_suffix (3.1.1)
+    racc (1.5.2)
+    racc (1.5.2-java)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     rouge (3.13.0)
     ruby-enum (0.7.2)
       i18n
+    ruby2_keywords (0.0.4)
     rubyzip (2.3.0)
     safe_yaml (1.0.5)
     sass (3.7.4)