diff --git a/CHANGELOG.md b/CHANGELOG.md
index d590cdb..6e5bd20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+# v9.1.0
+- Bump Promises dependency. (#8334)
+
 # v9.0.1
 - Fix Xcode 12.5 analyze warnings. (#26)
 
diff --git a/GoogleDataTransport.podspec b/GoogleDataTransport.podspec
index ba7193c..e5c187d 100644
--- a/GoogleDataTransport.podspec
+++ b/GoogleDataTransport.podspec
@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'GoogleDataTransport'
-  s.version          = '9.0.1'
+  s.version          = '9.1.0'
   s.summary          = 'Google iOS SDK data transport.'
 
   s.description      = <<-DESC
@@ -41,7 +41,7 @@ Shared library for iOS SDK data transport needs.
 
   s.dependency 'GoogleUtilities/Environment', '~> 7.2'
   s.dependency 'nanopb', '~> 2.30908.0'
-  s.dependency 'PromisesObjC', '~> 1.2'
+  s.dependency 'PromisesObjC', '>= 1.2', '< 3.0'
 
   header_search_paths = {
     'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}/"'
diff --git a/Package.swift b/Package.swift
index bc6c7c3..95e750b 100644
--- a/Package.swift
+++ b/Package.swift
@@ -32,6 +32,11 @@ let package = Package(
       url: "https://github.com/firebase/nanopb.git",
       "2.30908.0" ..< "2.30909.0"
     ),
+    .package(
+      name: "Promises",
+      url: "https://github.com/google/promises.git",
+      "1.2.8" ..< "3.0.0"
+    ),
     .package(
       name: "GoogleUtilities",
       url: "https://github.com/google/GoogleUtilities.git",
@@ -44,6 +49,7 @@ let package = Package(
       name: "GoogleDataTransport",
       dependencies: [
         .product(name: "nanopb", package: "nanopb"),
+        .product(name: "FBLPromises", package: "Promises"),
         .product(name: "GULEnvironment", package: "GoogleUtilities"),
       ],
       path: "GoogleDataTransport",