diff --git a/requirements/common.txt b/requirements/common.txt
index 232b7d71d3..2bd8330785 100644
--- a/requirements/common.txt
+++ b/requirements/common.txt
@@ -57,7 +57,7 @@ django-bitfield==1.9.3
 django-statsd-mozilla==0.3.16
 
 docopt==0.6.2
-fonttools==3.13.1
+fonttools==3.15.0
 
 # Needed for Android push notifications
 python-gcm==0.4
diff --git a/requirements/py3_common_lock.txt b/requirements/py3_common_lock.txt
index 6604f53b8b..9b4b17adcb 100644
--- a/requirements/py3_common_lock.txt
+++ b/requirements/py3_common_lock.txt
@@ -33,7 +33,7 @@ django-statsd-mozilla==0.3.16
 django-webpack-loader==0.5.0
 django==1.11.4
 docopt==0.6.2
-fonttools==3.13.1
+fonttools==3.15.0
 gitdb==0.6.4
 google-api-python-client==1.6.2
 goslate==1.5.1            # via pydictionary