diff --git a/CMakeLists.txt b/CMakeLists.txt
index 06235a157b..34a22049d5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,8 +23,8 @@ set(CMAKE_MACOSX_RPATH 1)
 set(TITLE_SEQUENCE_URL  "https://github.com/OpenRCT2/title-sequences/releases/download/v0.1.2b/title-sequence-v0.1.2b.zip")
 set(TITLE_SEQUENCE_SHA1 "19263f8ca383345959473e64da4785a60f00f420")
 
-set(OBJECTS_URL  "https://github.com/OpenRCT2/objects/releases/download/v1.0.10/objects.zip")
-set(OBJECTS_SHA1 "0e88a1a6d845eb3a56ad68ecf60a9d6a4194250f")
+set(OBJECTS_URL  "https://github.com/OpenRCT2/objects/releases/download/v1.0.11/objects.zip")
+set(OBJECTS_SHA1 "8674120086929f9196560d77cada631fb478d7c0")
 
 option(FORCE32 "Force 32-bit build. It will add `-m32` to compiler flags.")
 option(WITH_TESTS "Build tests")
diff --git a/OpenRCT2.xcodeproj/project.pbxproj b/OpenRCT2.xcodeproj/project.pbxproj
index 8fecaa1f50..1fd8cf5444 100644
--- a/OpenRCT2.xcodeproj/project.pbxproj
+++ b/OpenRCT2.xcodeproj/project.pbxproj
@@ -3727,7 +3727,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "version=\"1.0.10\"\nzipname=\"objects.zip\"\nliburl=\"https://github.com/OpenRCT2/objects/releases/download/v$version/$zipname\"\n\n[[ ! -d \"${SRCROOT}/data/object\" || ! -e \"${SRCROOT}/objectsversion\" || $(head -n 1 \"${SRCROOT}/objectsversion\") != $version ]]\noutdated=$?\n\nif [[ $outdated -eq 0 ]]; then\nif [[ -d \"${SRCROOT}/data/object\" ]]; then rm -r \"${SRCROOT}/data/object\"; fi\nmkdir -p \"${SRCROOT}/data/object\"\n\ncurl -L -o \"${SRCROOT}/data/object/$zipname\" \"$liburl\"\nunzip -uaq -d \"${SRCROOT}/data/object\" \"${SRCROOT}/data/object/$zipname\"\nrm \"${SRCROOT}/data/object/$zipname\"\n\necho $version > \"${SRCROOT}/objectsversion\"\nfi";
+			shellScript = "version=\"1.0.11\"\nzipname=\"objects.zip\"\nliburl=\"https://github.com/OpenRCT2/objects/releases/download/v$version/$zipname\"\n\n[[ ! -d \"${SRCROOT}/data/object\" || ! -e \"${SRCROOT}/objectsversion\" || $(head -n 1 \"${SRCROOT}/objectsversion\") != $version ]]\noutdated=$?\n\nif [[ $outdated -eq 0 ]]; then\nif [[ -d \"${SRCROOT}/data/object\" ]]; then rm -r \"${SRCROOT}/data/object\"; fi\nmkdir -p \"${SRCROOT}/data/object\"\n\ncurl -L -o \"${SRCROOT}/data/object/$zipname\" \"$liburl\"\nunzip -uaq -d \"${SRCROOT}/data/object\" \"${SRCROOT}/data/object/$zipname\"\nrm \"${SRCROOT}/data/object/$zipname\"\n\necho $version > \"${SRCROOT}/objectsversion\"\nfi";
 		};
 		C68B2D471EC790710020651C /* Download Libraries */ = {
 			isa = PBXShellScriptBuildPhase;
diff --git a/distribution/changelog.txt b/distribution/changelog.txt
index 2acf3cba70..a7d35163cb 100644
--- a/distribution/changelog.txt
+++ b/distribution/changelog.txt
@@ -63,6 +63,7 @@
 - Fix: [#9411] Ad campaigns end too soon.
 - Fix: [#9424] Crash using multi threading with TrueType fonts.
 - Fix: [#9476] Running `simulate` command on park yields `Completed: (null)`.
+- Fix: [#9520] Time Twister object artdec29 conversion problem.
 - Fix: Guests eating popcorn are drawn as if they're eating pizza.
 - Fix: The arbitrary ride type and vehicle dropdown lists are ordered case-sensitively.
 - Improved: [#6116] Expose colour scheme for track elements in the tile inspector.
diff --git a/openrct2.proj b/openrct2.proj
index d07b342143..c93724bcb9 100644
--- a/openrct2.proj
+++ b/openrct2.proj
@@ -70,8 +70,8 @@
     <GtestSha1>058b9df80244c03f1633cb06e9f70471a29ebb8e</GtestSha1>
     <TitleSequencesUrl>https://github.com/OpenRCT2/title-sequences/releases/download/v0.1.2b/title-sequence-v0.1.2b.zip</TitleSequencesUrl>
     <TitleSequencesSha1>19263f8ca383345959473e64da4785a60f00f420</TitleSequencesSha1>
-    <ObjectsUrl>https://github.com/OpenRCT2/objects/releases/download/v1.0.10/objects.zip</ObjectsUrl>
-    <ObjectsSha1>0e88a1a6d845eb3a56ad68ecf60a9d6a4194250f</ObjectsSha1>
+    <ObjectsUrl>https://github.com/OpenRCT2/objects/releases/download/v1.0.11/objects.zip</ObjectsUrl>
+    <ObjectsSha1>8674120086929f9196560d77cada631fb478d7c0</ObjectsSha1>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/shell.nix b/shell.nix
index f22202962d..bc62e53b35 100644
--- a/shell.nix
+++ b/shell.nix
@@ -15,8 +15,8 @@ let
   objects-src = pkgs.fetchFromGitHub {
     owner = "OpenRCT2";
     repo = "objects";
-    rev = "v1.0.10";
-    sha256 = "4f261964f1c01a04b7600d3d082fb4d3d9ec0d543c4eb66a819eb2ad01417aa0";
+    rev = "v1.0.11";
+    sha256 = "21e83bd2afad735cc0f5d13f9c99a5dee81ea0ef3a6b937c0bfaadb7f0572c34";
   };
 
   title-sequences-src = pkgs.fetchFromGitHub {
diff --git a/src/openrct2-android/app/build.gradle b/src/openrct2-android/app/build.gradle
index 8737b080f4..884ff052cc 100644
--- a/src/openrct2-android/app/build.gradle
+++ b/src/openrct2-android/app/build.gradle
@@ -98,7 +98,7 @@ android.applicationVariants.all { variant ->
             into "$variant.mergeAssets.outputDir/data/title"
         }
         download {
-            src 'https://github.com/OpenRCT2/objects/releases/download/v1.0.10/objects.zip'
+            src 'https://github.com/OpenRCT2/objects/releases/download/v1.0.11/objects.zip'
             dest new File(buildDir, 'objects.zip')
         }
         copy {