diff --git a/.changeset/small-ways-sleep.md b/.changeset/small-ways-sleep.md
new file mode 100644
index 00000000000..400194ffef6
--- /dev/null
+++ b/.changeset/small-ways-sleep.md
@@ -0,0 +1,7 @@
+---
+"@fuel-ts/abi-typegen": patch
+"@fuel-ts/versions": patch
+"@internal/forc": patch
+---
+
+chore: upgrading `forc` to `0.66.4`
diff --git a/apps/docs-snippets/test/fixtures/abi/encode-and-decode.jsonc b/apps/docs-snippets/test/fixtures/abi/encode-and-decode.jsonc
index 61d29a1c8da..7bb17f6f4be 100644
--- a/apps/docs-snippets/test/fixtures/abi/encode-and-decode.jsonc
+++ b/apps/docs-snippets/test/fixtures/abi/encode-and-decode.jsonc
@@ -29,7 +29,7 @@
     {
       "name": "AMOUNT",
       "concreteTypeId": "d7649d428b9ff33d188ecbf38a7e4d8fd167fa01b2e10fe9a8f9308e52f1d7cc",
-      "offset": 944,
+      "offset": 968,
     },
   ],
 }
diff --git a/internal/forc/VERSION b/internal/forc/VERSION
index 0596230fa4f..e890bffdf27 100644
--- a/internal/forc/VERSION
+++ b/internal/forc/VERSION
@@ -1 +1 @@
-0.66.2
+0.66.4
diff --git a/packages/abi-typegen/test/fixtures/templates/contract-with-configurable/main.hbs b/packages/abi-typegen/test/fixtures/templates/contract-with-configurable/main.hbs
index 394cb1f3f41..d767304335a 100644
--- a/packages/abi-typegen/test/fixtures/templates/contract-with-configurable/main.hbs
+++ b/packages/abi-typegen/test/fixtures/templates/contract-with-configurable/main.hbs
@@ -160,17 +160,17 @@ const abi = {
     {
       "name": "SHOULD_RETURN",
       "concreteTypeId": "b760f44fa5965c2474a3b471467a22c43185152129295af588b022ae50b50903",
-      "offset": 2768
+      "offset": 2776
     },
     {
       "name": "AN_OPTION",
       "concreteTypeId": "2da102c46c7263beeed95818cd7bee801716ba8303dddafdcd0f6c9efda4a0f1",
-      "offset": 2744
+      "offset": 2752
     },
     {
       "name": "A_GENERIC_STRUCT",
       "concreteTypeId": "71df88006611ffff852cf617defb70f77adaf507305088cedd41d276c783aab0",
-      "offset": 2760
+      "offset": 2768
     }
   ]
 };
diff --git a/packages/abi-typegen/test/fixtures/templates/script-with-configurable/main.hbs b/packages/abi-typegen/test/fixtures/templates/script-with-configurable/main.hbs
index fb4a272eb19..71b9ba3cb53 100644
--- a/packages/abi-typegen/test/fixtures/templates/script-with-configurable/main.hbs
+++ b/packages/abi-typegen/test/fixtures/templates/script-with-configurable/main.hbs
@@ -81,7 +81,7 @@ const abi = {
     {
       "name": "SHOULD_RETURN",
       "concreteTypeId": "b760f44fa5965c2474a3b471467a22c43185152129295af588b022ae50b50903",
-      "offset": 752
+      "offset": 760
     }
   ]
 };
diff --git a/packages/versions/src/lib/getBuiltinVersions.ts b/packages/versions/src/lib/getBuiltinVersions.ts
index 9541c6a98bd..28c288daeff 100644
--- a/packages/versions/src/lib/getBuiltinVersions.ts
+++ b/packages/versions/src/lib/getBuiltinVersions.ts
@@ -2,7 +2,7 @@ import type { Versions } from './types';
 
 export function getBuiltinVersions(): Versions {
   return {
-    FORC: '0.66.2',
+    FORC: '0.66.4',
     FUEL_CORE: '0.40.0',
     FUELS: '0.96.1',
   };