diff --git a/Changelog.md b/Changelog.md
index 87d1782393755778ee9396638b673f2a0a644f90..b78c946fadb3d7abef38a34baac72288b2d87546 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,7 @@
+# 0.5.10.1
+
+We made a mistake and removed `mysql2` from the `Gemfile.lock` in a recent gem update. Since this could cause some issues for some installations, we decided to release a hotfix.
+
 # 0.5.10.0
 
 ## Refactor
diff --git a/Gemfile.lock b/Gemfile.lock
index 1ab4062e8c3e28be073e6cf6281b2a2e28ebbda6..b0e28698d2f1acf6f48b27df7dcd7b820a8f76ad 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -474,6 +474,7 @@ GEM
     multi_test (0.1.2)
     multi_xml (0.5.5)
     multipart-post (2.0.0)
+    mysql2 (0.4.4)
     naught (1.1.0)
     nenv (0.3.0)
     nested_form (0.3.2)
@@ -516,7 +517,6 @@ GEM
     orm_adapter (0.5.0)
     parser (2.3.1.2)
       ast (~> 2.2)
-    pg (0.18.4)
     phantomjs (2.1.1.0)
     pkg-config (1.1.7)
     powerpack (0.1.1)
@@ -846,6 +846,7 @@ DEPENDENCIES
   mini_magick (= 4.5.1)
   minitest
   mobile-fu (= 1.3.1)
+  mysql2 (= 0.4.4)
   nokogiri (= 1.6.8)
   omniauth (= 1.3.1)
   omniauth-facebook (= 3.0.0)
@@ -853,7 +854,6 @@ DEPENDENCIES
   omniauth-twitter (= 1.2.1)
   omniauth-wordpress (= 0.2.2)
   open_graph_reader (= 0.6.1)
-  pg (= 0.18.4)
   pry
   pry-byebug
   quiet_assets (= 1.1.0)