diff --git a/lib/types/dm-ops.js b/lib/types/dm-ops.js
--- a/lib/types/dm-ops.js
+++ b/lib/types/dm-ops.js
@@ -392,7 +392,7 @@
   tShape<DMCreateEntryOperation>({
     type: tString(dmOperationTypes.CREATE_ENTRY),
     threadID: t.String,
-    creatorID: t.String,
+    creatorID: tUserID,
     time: t.Number,
     entryID: t.String,
     entryDate: t.String,
@@ -415,7 +415,7 @@
   tShape<DMDeleteEntryOperation>({
     type: tString(dmOperationTypes.DELETE_ENTRY),
     threadID: t.String,
-    creatorID: t.String,
+    creatorID: tUserID,
     time: t.Number,
     creationTime: t.Number,
     entryID: t.String,
@@ -439,7 +439,7 @@
   tShape<DMEditEntryOperation>({
     type: tString(dmOperationTypes.EDIT_ENTRY),
     threadID: t.String,
-    creatorID: t.String,
+    creatorID: tUserID,
     creationTime: t.Number,
     time: t.Number,
     entryID: t.String,
@@ -461,7 +461,7 @@
   tShape<DMUpdateRelationshipOperation>({
     type: tString(dmOperationTypes.UPDATE_RELATIONSHIP),
     threadID: t.String,
-    creatorID: t.String,
+    creatorID: tUserID,
     time: t.Number,
     operation: t.enums.of([
       'request_sent',