1 files changed, 4 insertions, 2 deletions
diff --git a/setup.py b/setup.py
index 9343dd99..c5837b82 100644
--- a/setup.py
+++ b/setup.py
@@ -13,7 +13,9 @@ with open(os.path.join(here, 'README.rst'), encoding='utf-8') as f:
     long_description = f.read()
 
 with open(os.path.join(here, "mitmproxy", "version.py")) as f:
-    VERSION = re.search(r'VERSION = "(.+?)"', f.read()).group(1)
+    match = re.search(r'VERSION = "(.+?)"', f.read())
+    assert match
+    VERSION = match.group(1)
 
 setup(
     name="mitmproxy",
@@ -74,7 +76,7 @@ setup(
         "passlib>=1.6.5, <1.8",
         "protobuf>=3.6.0, <3.11",
         "pyasn1>=0.3.1,<0.5",
-        "pyOpenSSL>=19.0.0,<20",
+        "pyOpenSSL==19.0.0",
         "pyparsing>=2.4.2,<2.5",
         "pyperclip>=1.6.0,<1.8",
         "ruamel.yaml>=0.16,<0.17",