diff --git a/.taskcluster.yml b/.taskcluster.yml
index f7ec151f292..f327868440d 100644
--- a/.taskcluster.yml
+++ b/.taskcluster.yml
@@ -18,6 +18,8 @@ tasks:
         source: ${event.compare}
       scopes:
         - "queue:create-task:aws-provisioner-v1/github-worker"
+        - "docker-worker:cache:cargo-registry-cache"
+        - "docker-worker:cache:cargo-git-cache"
 
       payload:
         maxRunTime: 600
diff --git a/decision-task.py b/decision-task.py
index dba40d7e238..a0a6acc468f 100644
--- a/decision-task.py
+++ b/decision-task.py
@@ -19,9 +19,18 @@ payload = {
         "owner": os.environ["DECISION_TASK_OWNER"],
         "source": os.environ["DECISION_TASK_SOURCE"],
     },
+    # https://docs.taskcluster.net/docs/reference/workers/docker-worker/docs/caches
+    "scopes": [
+        "docker-worker:cache:cargo-registry-cache",
+        "docker-worker:cache:cargo-git-cache",
+    ],
     "payload": {
         "maxRunTime": 600,
         "image": "buildpack-deps:bionic-scm",
+        "cache": {
+            "cargo-registry-cache": "/root/.cargo/registry",
+            "cargo-git-cache": "/root/.cargo/git",
+        },
         "command": [
             "/bin/bash",
             "--login",