diff --git a/detect_secrets/plugins/keyword.py b/detect_secrets/plugins/keyword.py
index 7f22c3eef..f59af98a4 100644
--- a/detect_secrets/plugins/keyword.py
+++ b/detect_secrets/plugins/keyword.py
@@ -55,7 +55,7 @@ def analyze_string(self, string, line_num, filename):
         if WHITELIST_REGEX.search(string):
             return output
 
-        for identifier in self.secret_generator(string.lower()):
+        for identifier in self.secret_generator(string):
             secret = PotentialSecret(
                 self.secret_type,
                 filename,