diff --git a/CHANGELOG.md b/CHANGELOG.md
index 146ef7d..0e6d4a7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [UNRELEASED]
 
+## [4.2.1] - 2022.09.27
+
+### Fixed
+
+- Fixed incorrect find regex producing overly broad fanging of any character preceeded with a `\` ([#99](https://github.com/ioc-fang/ioc-fanger/issues/99))
+
 ## [4.2.0] - 2022.09.17
 
 ### Changed
diff --git a/ioc_fanger/regexes_fang.py b/ioc_fanger/regexes_fang.py
index a40c61a..b680a63 100644
--- a/ioc_fanger/regexes_fang.py
+++ b/ioc_fanger/regexes_fang.py
@@ -149,7 +149,7 @@
     {"find": r"(\<\.\>)", "replace": "."},
     {
         # "\." -> "."
-        "find": r"(\\.)",
+        "find": r"(\\\.)",
         "replace": ".",
     },
 ]
diff --git a/tests/test_ioc_fanger.py b/tests/test_ioc_fanger.py
index 65b8277..2113453 100644
--- a/tests/test_ioc_fanger.py
+++ b/tests/test_ioc_fanger.py
@@ -425,3 +425,14 @@ def test_alternative_schemes_preserved():
     s = "ldap://example.com/a"
     result = ioc_fanger.fang(s)
     assert result == "ldap://example.com/a"
+
+
+def test_pr_99__escaped_periods():
+    s = "HKLM\\SOFTWARE\\foo bar\\bing buzz boom\\b"
+    result = ioc_fanger.fang(s)
+    assert result == "HKLM\\SOFTWARE\\foo bar\\bing buzz boom\\b"
+
+    s = "foo$.bar foo\\.bar"
+    result = ioc_fanger.fang(s)
+    assert result == "foo$.bar foo.bar"
+