diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3dfe8b8d9a70970ad39ffbe6f414114ed1e61fd2..00113ca31f0307c703dbd8f1736d9b38835430ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ that users understand how the changes affect the new version.
 -->
 version 3.1.0
 ---------------------------
++ Isoseq3: Required more memory for common datasets.
 + Isoseq3: Remove cp commands and other bash magic, file naming is now solved by pipeline.
 + Lima: Replace mv command with cp.
 + Add WDL task for smoove (lumpy) sv-caller.
diff --git a/isoseq3.wdl b/isoseq3.wdl
index 44005a408d7ed2694203e601be58c540957506f8..007aa00204b141dfc2884b8df1aa95271395458d 100644
--- a/isoseq3.wdl
+++ b/isoseq3.wdl
@@ -31,7 +31,7 @@ task Refine {
         String outputNamePrefix
 
         Int cores = 2
-        String memory = "1G"
+        String memory = "2G"
         String dockerImage = "quay.io/biocontainers/isoseq3:3.3.0--0"
     }