diff --git a/Gemfile.lock b/Gemfile.lock
index b0baba6eaa8f..69f6fbab0b50 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/citation-style-language/Sheldon.git
-  revision: c2cc508c57157ee7d00948e24c46e10e3f319d57
+  revision: 7822dbda11e229cbd933f84a3a1cfdbe8e75dfaf
   specs:
     sheldon (1.0.2)
       citeproc-ruby
@@ -14,42 +14,42 @@ GIT
 GEM
   remote: https://rubygems.org/
   specs:
-    citeproc (1.0.9)
+    citeproc (1.0.10)
       namae (~> 1.0)
-    citeproc-ruby (1.1.10)
+    citeproc-ruby (1.1.12)
       citeproc (~> 1.0, >= 1.0.9)
       csl (~> 1.5)
-    csl (1.5.0)
+    csl (1.5.1)
       namae (~> 1.0)
-    csl-styles (1.0.1.9)
+    csl-styles (1.0.1.10)
       csl (~> 1.0)
-    diff-lcs (1.3)
-    diffy (3.3.0)
-    dotenv (2.7.5)
+    diff-lcs (1.4.4)
+    diffy (3.4.0)
+    dotenv (2.7.6)
     fuubar (2.5.0)
       rspec-core (~> 3.0)
       ruby-progressbar (~> 1.4)
     mini_portile2 (2.4.0)
     namae (1.0.1)
-    nokogiri (1.10.8)
+    nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
-    ostruct (0.1.0)
+    ostruct (0.2.0)
     rake (13.0.1)
-    reverse_markdown (1.3.0)
+    reverse_markdown (2.0.0)
       nokogiri
     rspec (3.9.0)
       rspec-core (~> 3.9.0)
       rspec-expectations (~> 3.9.0)
       rspec-mocks (~> 3.9.0)
-    rspec-core (3.9.0)
-      rspec-support (~> 3.9.0)
-    rspec-expectations (3.9.0)
+    rspec-core (3.9.2)
+      rspec-support (~> 3.9.3)
+    rspec-expectations (3.9.2)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
-    rspec-mocks (3.9.0)
+    rspec-mocks (3.9.1)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.9.0)
-    rspec-support (3.9.0)
+    rspec-support (3.9.3)
     ruby-progressbar (1.10.1)
 
 PLATFORMS