diff --git a/Gemfile b/Gemfile
index f5efff4..95673cb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,7 +1,7 @@
 source "https://rubygems.org"
 
 # Make sure Jekyll 3.3 is running
-gem "jekyll", "~> 3.8"
+gem "jekyll", "~> 3.9"
 
 # The theme for the site
 gem "alembic-jekyll-theme", "~> 3.1"
diff --git a/Gemfile.lock b/Gemfile.lock
index 07f3eaf..e3c2eab 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -24,12 +24,12 @@ GEM
     colorator (1.1.0)
     commonmarker (0.20.2)
       ruby-enum (~> 0.5)
-    concurrent-ruby (1.1.6)
-    em-websocket (0.5.1)
+    concurrent-ruby (1.1.8)
+    em-websocket (0.5.2)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0.6.0)
     eventmachine (1.2.7)
-    ffi (1.12.2)
+    ffi (1.15.0)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     html-pipeline (2.12.3)
@@ -38,14 +38,14 @@ GEM
     http_parser.rb (0.6.0)
     i18n (0.9.5)
       concurrent-ruby (~> 1.0)
-    jekyll (3.8.6)
+    jekyll (3.9.1)
       addressable (~> 2.4)
       colorator (~> 1.0)
       em-websocket (~> 0.5)
       i18n (~> 0.7)
       jekyll-sass-converter (~> 1.0)
       jekyll-watch (~> 2.0)
-      kramdown (~> 1.14)
+      kramdown (>= 1.17, < 3)
       liquid (~> 4.0)
       mercenary (~> 0.3.3)
       pathutil (~> 0.9)
@@ -78,9 +78,10 @@ GEM
       gemoji (~> 3.0)
       html-pipeline (~> 2.2)
       jekyll (>= 3.0, < 5.0)
-    kramdown (1.17.0)
+    kramdown (2.3.1)
+      rexml
     liquid (4.0.3)
-    listen (3.2.1)
+    listen (3.5.1)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
@@ -90,11 +91,12 @@ GEM
       mini_portile2 (~> 2.4.0)
     pathutil (0.16.2)
       forwardable-extended (~> 2.6)
-    public_suffix (4.0.3)
-    rb-fsevent (0.10.3)
+    public_suffix (4.0.6)
+    rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rouge (3.16.0)
+    rexml (3.2.5)
+    rouge (3.26.0)
     ruby-enum (0.7.2)
       i18n
     safe_yaml (1.0.5)
@@ -113,7 +115,7 @@ PLATFORMS
 
 DEPENDENCIES
   alembic-jekyll-theme (~> 3.1)
-  jekyll (~> 3.8)
+  jekyll (~> 3.9)
   jekyll-feed
   jekyll-mentions
   jekyll-paginate