diff --git a/amboar/obmc-scripts/maintainers/obmc-gerrit b/amboar/obmc-scripts/maintainers/obmc-gerrit
index 800e561..e7e8f6a 100755
--- a/amboar/obmc-scripts/maintainers/obmc-gerrit
+++ b/amboar/obmc-scripts/maintainers/obmc-gerrit
@@ -17,7 +17,7 @@
 git = sh.git.bake()
 
 def get_reviewers(root: Optional[str]=None, mname: str='MAINTAINERS') -> List[str]:
-    reviewers: List[str] = list()
+    reviewers = cast(List[str], list())
     if not root:
         root = git('rev-parse', '--show-toplevel').strip()
     mfile = os.path.join(root, mname)
diff --git a/amboar/obmc-scripts/maintainers/obmc/maintainers.py b/amboar/obmc-scripts/maintainers/obmc/maintainers.py
index d18d676..2b261af 100755
--- a/amboar/obmc-scripts/maintainers/obmc/maintainers.py
+++ b/amboar/obmc-scripts/maintainers/obmc/maintainers.py
@@ -106,7 +106,7 @@
 
 def parse_block(src: Iterator[str]) -> Optional[B]:
     state = ParseState.BEGIN
-    repo: Dict[LineType, D] = OrderedDict()
+    repo = cast(B, OrderedDict())
     for line in src:
         try:
             entry = parse_line(line)
@@ -149,10 +149,10 @@
             break
 
 def parse_maintainers(src: Iterator[str]) -> Dict[D, B]:
-    maintainers: Dict[D, B] = OrderedDict()
+    maintainers = cast(Dict[D, B], OrderedDict())
     trash_preamble(src)
     while True:
-        repo: B = parse_block(src)
+        repo = cast(B, parse_block(src))
         if not repo:
             break
         maintainers[repo[LineType.REPO]] = repo