diff --git a/requirements.txt b/requirements.txt
index 2f22aef66..98b14391c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ murmurhash>=0.28,<0.29
 plac<1.0.0,>=0.9.6
 ujson>=1.35
 dill>=0.2,<0.3
-regex==2018.08.29
+regex==2018.08.17
 requests>=2.13.0,<3.0.0
 pytest>=3.6.0,<4.0.0
 mock>=2.0.0,<3.0.0
diff --git a/setup.py b/setup.py
index f030a8f68..1fa64bbdc 100755
--- a/setup.py
+++ b/setup.py
@@ -195,7 +195,7 @@ def setup_package():
                 'plac<1.0.0,>=0.9.6',
                 'ujson>=1.35',
                 'dill>=0.2,<0.3',
-                'regex==2018.8.29',
+                'regex==2018.8.17',
                 'requests>=2.13.0,<3.0.0',
                 'pathlib==1.0.1; python_version < "3.4"'],
             classifiers=[