diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ea83489a..86f54b17 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,7 +9,7 @@ on:
 # Remember to update me in package-set.yml as well
 env:
   vessel_version: "v0.6.3"
-  moc_version: "0.6.30"
+  moc_version: "0.7.0"
 
 jobs:
   tests:
diff --git a/.github/workflows/package-set.yml b/.github/workflows/package-set.yml
index 02f0ad01..dcd11205 100644
--- a/.github/workflows/package-set.yml
+++ b/.github/workflows/package-set.yml
@@ -8,7 +8,7 @@ on:
 
 env:
   vessel_version: "v0.6.3"
-  moc_version: "0.6.30"
+  moc_version: "0.7.0"
 
 jobs:
   verify:
diff --git a/src/TrieSet.mo b/src/TrieSet.mo
index 6ee399ea..fcc8ab8d 100644
--- a/src/TrieSet.mo
+++ b/src/TrieSet.mo
@@ -26,13 +26,13 @@ module {
 
   /// Put an element into the set.
   public func put<T>(s : Set<T>, x : T, xh : Hash, eq : (T, T) -> Bool) : Set<T> {
-    let (s2, _) = Trie.put<T,()>(s, { key = x; hash = xh }, eq, ());
+    let s2 = Trie.put<T,()>(s, { key = x; hash = xh }, eq, ()).0;
     s2
   };
 
   /// Delete an element from the set.
   public func delete<T>(s : Set<T>, x : T, xh : Hash, eq : (T, T) -> Bool) : Set<T> {
-    let (s2, _) = Trie.remove<T, ()>(s, { key = x; hash = xh }, eq);
+    let s2 = Trie.remove<T, ()>(s,  { key = x; hash = xh}, eq).0;
     s2
   };