diff --git a/Gemfile.lock b/Gemfile.lock
index fb20302..85f4707 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,18 +13,26 @@ GEM
       dm-core (~> 1.2.0)
     dm-migrations (1.2.0)
       dm-core (~> 1.2.0)
+    dm-postgres-adapter (1.2.0)
+      dm-do-adapter (~> 1.2.0)
+      do_postgres (~> 0.10.6)
     dm-sqlite-adapter (1.2.0)
       dm-do-adapter (~> 1.2.0)
       do_sqlite3 (~> 0.10.6)
+    do_postgres (0.10.17)
+      data_objects (= 0.10.17)
     do_sqlite3 (0.10.17)
       data_objects (= 0.10.17)
+    eventmachine (1.2.7)
     eventmachine (1.2.7-x64-mingw32)
+    ffi (1.12.2)
     ffi (1.12.2-x64-mingw32)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
+    pg (1.2.3)
     pg (1.2.3-x64-mingw32)
     public_suffix (4.0.5)
-    rack (2.2.2)
+    rack (2.2.6.4)
     rack-protection (2.0.8.1)
       rack
     rb-fsevent (0.10.4)
@@ -53,10 +61,12 @@ GEM
 
 PLATFORMS
   x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   dm-core
   dm-migrations
+  dm-postgres-adapter
   dm-sqlite-adapter
   pg
   sass