diff --git a/umi-tools.wdl b/umi-tools.wdl
index 0a99d2bdb1a8fd283cbf7331e8ec6eff993e5255..86f5d64e06499cfbd30089b621d4c48e09c1850e 100644
--- a/umi-tools.wdl
+++ b/umi-tools.wdl
@@ -113,10 +113,10 @@ task Dedup {
         inputBamIndex: {description: "The index for the ipnut BAM file.", cateogry: "required"}
         outputBamPath: {description: "The location to write the output BAM file to.", category: "required"}
         statsPrefix: {description: "The prefix for the stats files.", category: "advanced"}
-        umiSeparator: {description: "Seperator for UMI sequence", category: "advanced"}
+        umiSeparator: {description: "Seperator used for UMIs in the read names.", category: "advanced"}
         paired: {description: "Whether or not the data is paired.", category: "common"}
         memory: {description: "The amount of memory required for the task.", category: "advanced"}
         dockerImage: {description: "The docker image used for this task. Changing this may result in errors which the developers may choose not to address.",
                       category: "advanced"}
     }
-}
\ No newline at end of file
+}