diff --git a/homeassistant/package_constraints.txt b/homeassistant/package_constraints.txt
index dfbf056936f..9f849146fe3 100644
--- a/homeassistant/package_constraints.txt
+++ b/homeassistant/package_constraints.txt
@@ -114,3 +114,7 @@ backoff<2.0
 # Breaking change in version
 # https://github.com/samuelcolvin/pydantic/issues/4092
 pydantic!=1.9.1
+
+# Pin charset-normalizer to 2.0.12 due to version conflict.
+# https://github.com/home-assistant/core/pull/74104
+charset-normalizer==2.0.12
diff --git a/script/gen_requirements_all.py b/script/gen_requirements_all.py
index a2a0eab897a..c6b50c6bd32 100755
--- a/script/gen_requirements_all.py
+++ b/script/gen_requirements_all.py
@@ -132,6 +132,10 @@ backoff<2.0
 # Breaking change in version
 # https://github.com/samuelcolvin/pydantic/issues/4092
 pydantic!=1.9.1
+
+# Pin charset-normalizer to 2.0.12 due to version conflict.
+# https://github.com/home-assistant/core/pull/74104
+charset-normalizer==2.0.12
 """
 
 IGNORE_PRE_COMMIT_HOOK_ID = (