diff --git a/setup.py b/setup.py
index 883e293..dd22ca7 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
     "azure-cognitiveservices-speech",
     "numpy",
     "uuid6",
-    'protobuf = "3.20.2"',
+    "protobuf==3.20.2",
     "nltk",
     "spacy",
     # # Cannot add specific URLs to dependencies in PyPI, so this is commented out, but it works otherwise.