diff --git a/youtube_dl/extractor/americastestkitchen.py b/youtube_dl/extractor/americastestkitchen.py
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diff --git a/youtube_dl/extractor/cda.py b/youtube_dl/extractor/cda.py
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diff --git a/youtube_dl/extractor/joj.py b/youtube_dl/extractor/joj.py
old mode 100755
new mode 100644
diff --git a/youtube_dl/extractor/picarto.py b/youtube_dl/extractor/picarto.py
old mode 100755
new mode 100644