diff --git a/requirements-dev.txt b/requirements-dev.txt
index b4e690bb..3a1ab332 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -2,8 +2,8 @@ black==19.3b0
 codecov==2.0.15
 coverage==4.5.4
 flake8==3.7.8
-hypothesis==4.32.3
-hypothesmith==0.0.3
+hypothesis==4.36.0
+hypothesmith==0.0.4
 git+https://github.com/jimmylai/sphinx.git@slots_type_annotation
 isort==4.3.20
 jupyter==1.0.0
diff --git a/setup.py b/setup.py
index 9dcbb147..21ffba7d 100644
--- a/setup.py
+++ b/setup.py
@@ -35,7 +35,8 @@ setuptools.setup(
             "black",
             "codecov",
             "coverage",
-            "hypothesmith >= 0.0.3",
+            "hypothesis >= 4.36.0",
+            "hypothesmith >= 0.0.4",
             "isort",
             "flake8",
             "jupyter",