diff --git a/CHANGELOG.md b/CHANGELOG.md
index f79382e..3099954 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ This changelog documents the changes between release versions.
 
 Changes to be included in the next upcoming release.
 
+## v0.24
+
+* Pinned the Fastify version used to avoid using the latest version which does not work with Deno
+
 ## v0.23
 
 Update TS SDK dependency to v1.2.8.
diff --git a/src/sdk.ts b/src/sdk.ts
index 2a1d331..981b937 100644
--- a/src/sdk.ts
+++ b/src/sdk.ts
@@ -1,4 +1,5 @@
-
+// This pins the fastify version (transitively used by the ndc-sdk-typescript)
+// because 4.26.0 introduces a deno-incompatible change
+import fastify from "npm:fastify@4.25.2"
 // Have this dependency defined in one place
-
 export * as sdk from 'npm:@hasura/ndc-sdk-typescript@1.2.8';