diff --git a/.changeset/rare-points-change.md b/.changeset/rare-points-change.md
index 9ce10e25..28a38179 100644
--- a/.changeset/rare-points-change.md
+++ b/.changeset/rare-points-change.md
@@ -1,5 +1,5 @@
 ---
-'@reactflow/core': major
+'@reactflow/core': patch
 ---
 
 track modifier keys on useKeypress
diff --git a/.changeset/real-cats-sneeze.md b/.changeset/real-cats-sneeze.md
new file mode 100644
index 00000000..3f8f02bc
--- /dev/null
+++ b/.changeset/real-cats-sneeze.md
@@ -0,0 +1,5 @@
+---
+'@reactflow/core': patch
+---
+
+fix: check if handle is connectable
diff --git a/packages/core/src/components/Handle/utils.ts b/packages/core/src/components/Handle/utils.ts
index 58263781..bfd181e1 100644
--- a/packages/core/src/components/Handle/utils.ts
+++ b/packages/core/src/components/Handle/utils.ts
@@ -104,9 +104,10 @@ export function isValidHandle(
 
     // in strict mode we don't allow target to target or source to source connections
     const isValid =
-      connectionMode === ConnectionMode.Strict
+      handleToCheck.classList.contains('connectable') &&
+      (connectionMode === ConnectionMode.Strict
         ? (isTarget && handleType === 'source') || (!isTarget && handleType === 'target')
-        : handleNodeId !== fromNodeId || handleId !== fromHandleId;
+        : handleNodeId !== fromNodeId || handleId !== fromHandleId);
 
     if (isValid) {
       result.isValid = isValidConnection(connection);