diff --git a/Gemfile b/Gemfile
index 1e2221f..6c9b997 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,7 +28,7 @@ gem 'iri', '0.8.0'
 gem 'loog', '0.5.1'
 gem 'minitest', '5.21.2', require: false
 gem 'minitest-reporters', '1.6.1', require: false
-gem 'pgtk', '0.9.2'
+gem 'pgtk', '0.9.6'
 gem 'rack', '2.2.8.1'
 gem 'rack-ssl', '1.4.1'
 gem 'rack-test', '2.1.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index b0c877d..2e3b81b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -134,8 +134,8 @@ GEM
     parser (3.3.0.5)
       ast (~> 2.4.1)
       racc
-    pg (1.5.6)
-    pgtk (0.9.2)
+    pg (1.5.7)
+    pgtk (0.9.6)
       backtrace (~> 0.3)
       loog (~> 0.2)
       pg (~> 1.1)
@@ -302,7 +302,7 @@ DEPENDENCIES
   loog (= 0.5.1)
   minitest (= 5.21.2)
   minitest-reporters (= 1.6.1)
-  pgtk (= 0.9.2)
+  pgtk (= 0.9.6)
   rack (= 2.2.8.1)
   rack-ssl (= 1.4.1)
   rack-test (= 2.1.0)