diff --git a/contracts/oss-diff.yml b/contracts/oss-diff.yml
index bac1d334b..00da0ae4c 100644
--- a/contracts/oss-diff.yml
+++ b/contracts/oss-diff.yml
@@ -2323,6 +2323,16 @@ paths:
             enum:
               - gzip
               - identity
+        - in: header
+          name: Gzip-Compression-Level
+          description: The gzip compression level to use when compressing the response.
+          schema:
+            type: string
+            enum:
+              - none
+              - default
+              - speedy
+              - full
         - in: path
           name: shardID
           schema:
diff --git a/contracts/oss.json b/contracts/oss.json
index 7710ad58e..5c18a9b59 100644
--- a/contracts/oss.json
+++ b/contracts/oss.json
@@ -14415,6 +14415,20 @@
               ]
             }
           },
+          {
+            "in": "header",
+            "name": "Gzip-Compression-Level",
+            "description": "The gzip compression level to use when compressing the response.",
+            "schema": {
+              "type": "string",
+              "enum": [
+                "none",
+                "default",
+                "speedy",
+                "full"
+              ]
+            }
+          },
           {
             "in": "path",
             "name": "shardID",
diff --git a/contracts/oss.yml b/contracts/oss.yml
index dd4c129b9..c1b95e401 100644
--- a/contracts/oss.yml
+++ b/contracts/oss.yml
@@ -11711,6 +11711,16 @@ paths:
             enum:
               - gzip
               - identity
+        - in: header
+          name: Gzip-Compression-Level
+          description: The gzip compression level to use when compressing the response.
+          schema:
+            type: string
+            enum:
+              - none
+              - default
+              - speedy
+              - full
         - in: path
           name: shardID
           schema:
diff --git a/contracts/ref/oss.yml b/contracts/ref/oss.yml
index f5e867cb0..ee58f3b2c 100644
--- a/contracts/ref/oss.yml
+++ b/contracts/ref/oss.yml
@@ -7299,6 +7299,16 @@ paths:
           - gzip
           - identity
           type: string
+      - description: The gzip compression level to use when compressing the response.
+        in: header
+        name: Gzip-Compression-Level
+        schema:
+          enum:
+          - none
+          - default
+          - speedy
+          - full
+          type: string
       - description: The shard ID.
         in: path
         name: shardID
diff --git a/src/oss/paths/backup_shards_shardID.yml b/src/oss/paths/backup_shards_shardID.yml
index 3443e6c78..3ab5bb74b 100644
--- a/src/oss/paths/backup_shards_shardID.yml
+++ b/src/oss/paths/backup_shards_shardID.yml
@@ -15,6 +15,16 @@ get:
         enum:
           - gzip
           - identity
+    - in: header
+      name: Gzip-Compression-Level
+      description: The gzip compression level to use when compressing the response.
+      schema:
+        type: string
+        enum:
+          - none
+          - default
+          - speedy
+          - full
     - in: path
       name: shardID
       schema: