diff --git a/mastoposter/filters/text.py b/mastoposter/filters/text.py
index 7ced4ec..eb7738f 100644
--- a/mastoposter/filters/text.py
+++ b/mastoposter/filters/text.py
@@ -17,7 +17,7 @@ class TextFilter(BaseFilter, filter_name="content"):
         if self.mode == "regexp":
             self.regexp = regexp(section["regexp"])
         elif self.mode in ("hashtag", "tag"):
-            self.tags = set(section["tags"].split())
+            self.tags = set(map(str.lower, section["tags"].split()))
         else:
             raise ValueError(f"Invalid filter mode {self.mode}")
 
@@ -46,8 +46,7 @@ class TextFilter(BaseFilter, filter_name="content"):
                 is not None
             )
         elif self.tags:
-            print(f"{self.tags=} {source.tags=}")
-            return len(self.tags & {t.name for t in source.tags}) > 0
+            return len(self.tags & {t.name.lower() for t in source.tags}) > 0
         else:
             raise ValueError("Neither regexp or tags were set. Why?")