diff --git a/Gemfile.lock b/Gemfile.lock
index fb20302..b643e6d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -13,33 +13,41 @@ 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)
+    mustermann (2.0.2)
       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-protection (2.0.8.1)
+    rack (2.2.4)
+    rack-protection (2.2.3)
       rack
     rb-fsevent (0.10.4)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    ruby2_keywords (0.0.2)
+    ruby2_keywords (0.0.5)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-    sinatra (2.0.8.1)
-      mustermann (~> 1.0)
-      rack (~> 2.0)
-      rack-protection (= 2.0.8.1)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
       tilt (~> 2.0)
     slim (4.1.0)
       temple (>= 0.7.6, < 0.9)
@@ -49,14 +57,16 @@ GEM
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    tilt (2.0.10)
+    tilt (2.0.11)
 
 PLATFORMS
   x64-mingw32
+  x86_64-linux
 
 DEPENDENCIES
   dm-core
   dm-migrations
+  dm-postgres-adapter
   dm-sqlite-adapter
   pg
   sass