diff --git a/requirements.txt b/requirements.txt
index b4c3294..506c553 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,5 +21,5 @@ tox==2.9.1
 typing==3.6.2
 urllib3==1.22
 virtualenv==15.1.0
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 git+git://github.com/stuppie/wikicurie.git
diff --git a/test-requirements.txt b/test-requirements.txt
index 0ba7058..bbd7516 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -21,7 +21,7 @@ tox==2.9.1
 typing==3.6.2
 urllib3==1.22
 virtualenv==15.1.0
-Werkzeug==0.12.2
+Werkzeug==0.15.3
 git+git://github.com/stuppie/wikicurie.git
 flask_testing==0.6.1
 coverage>=4.0.3