diff --git a/CHANGELOG b/CHANGELOG
index 0d7de7d..fec8cdb 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,8 @@
+3.4.1
+-----
+
+* Force gevent<1.2.0 until this issue is fixed: https://github.com/gevent/gevent/issues/916
+
 3.4.0
 -----
 
diff --git a/setup.py b/setup.py
index e1bed16..159b55d 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ readme = open(os.path.join(DIR, 'README.md')).read()
 
 setup(
     name='web3',
-    version='3.4.0',
+    version='3.4.1',
     description="""Web3.py""",
     long_description=readme,
     author='Piper Merriam',
@@ -26,7 +26,7 @@ setup(
     install_requires=[
         "pysha3>=0.3",
         "rlp>=0.4.6,<0.4.7",
-        "gevent>=1.1.1",
+        "gevent>=1.1.1,<1.2.0",
         "geventhttpclient>=1.3.1",
         "ethereum-abi-utils>=0.2.1",
         "pysha3>=0.3",