diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e39e38d58b..da90fdbdc1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,7 +23,7 @@ Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ### Changed
 - Plugin source is now gzipped. #3392
-- Allowed characters in Agent event tags. #3399
+- Allowed characters in Agent event tags. #3399, #3676
 - Hard-coded Log4Shell exploiter to a plugin. #3388
 - Hard-coded SSH exploiter to a plugin. #3170
 - Identities and secrets can be associated when configuring credentials in the
diff --git a/monkey/common/agent_events/abstract_agent_event.py b/monkey/common/agent_events/abstract_agent_event.py
index 99b2deff5ec..1ee2c7deeec 100644
--- a/monkey/common/agent_events/abstract_agent_event.py
+++ b/monkey/common/agent_events/abstract_agent_event.py
@@ -8,7 +8,7 @@
 from common.base_models import InfectionMonkeyBaseModel, InfectionMonkeyModelConfig
 from common.types import AgentID, MachineID
 
-EVENT_TAG_REGEX = r"^[a-zA-Z0-9_-]+$"
+EVENT_TAG_REGEX = r"^[a-zA-Z0-9._-]+$"
 
 
 class AgentEventTag(ConstrainedStr):