1 files changed, 3 insertions, 3 deletions
diff --git a/_plugins/linter.rb b/_plugins/linter.rb
index c0059c9..94ebc67 100644
--- a/_plugins/linter.rb
+++ b/_plugins/linter.rb
@@ -107,9 +107,9 @@ module Jekyll
       end
 
       if name == 'screencasts' then
-        mkv = "resources/screencasts/#{date}-#{slug}.mkv"
-        unless File.exist? mkv then
-          raise "Missing MKV file '#{mkv}'"
+        webm = "resources/screencasts/#{date}-#{slug}.webm"
+        unless File.exist? webm then
+          raise "Missing WebM file '#{webm}'"
         end
       end
     end