diff --git a/MaruReader.xcodeproj/project.pbxproj b/MaruReader.xcodeproj/project.pbxproj
index 865a3db..e0c8937 100644
--- a/MaruReader.xcodeproj/project.pbxproj
+++ b/MaruReader.xcodeproj/project.pbxproj
@@ -4853,7 +4853,7 @@
 			repositoryURL = "https://github.com/readium/swift-toolkit.git";
 			requirement = {
 				kind = upToNextMajorVersion;
-				minimumVersion = 3.8.0;
+				minimumVersion = 3.9.0;
 			};
 		};
 		DBC9FEAE2E6C9B2800F1E920 /* XCRemoteSwiftPackageReference "Zip" */ = {
diff --git a/MaruReader.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved b/MaruReader.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
index 06dfe46..53b28d3 100644
--- a/MaruReader.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
+++ b/MaruReader.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved
@@ -87,8 +87,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/readium/swift-toolkit.git",
       "state" : {
-        "revision" : "f7d10d2bf5876408feae14d634416f69d1473fd8",
-        "version" : "3.8.0"
+        "revision" : "de07026e9f825a5791f27a7ac4cd6bb1a784ab8d",
+        "version" : "3.9.0"
       }
     },
     {