diff --git a/CHANGELOG.md b/CHANGELOG.md
index c5aaf49f73..5f9b38f5c8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 Major new release that includes WebGPU support
 
+### 9.0.27 - Sep 2, 2024
+
+- Revert "shadertools: PBR module using UBO (#2173)"
+
 ### 9.0.26 - Aug 28, 2024
 
 - examples: Fix build (#2228)
diff --git a/lerna.json b/lerna.json
index 6a7ec30c54..08254296b3 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,5 +1,5 @@
 {
-  "version": "9.0.26",
+  "version": "9.0.27",
   "npmClient": "yarn",
   "exact": true,
   "packages": [
diff --git a/modules/constants/package.json b/modules/constants/package.json
index 0e0390b18f..97d9da81c1 100644
--- a/modules/constants/package.json
+++ b/modules/constants/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/constants",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "WebGL2 constants",
   "type": "module",
   "license": "MIT",
diff --git a/modules/core/package.json b/modules/core/package.json
index ca8b9ef708..4e0d8a0126 100644
--- a/modules/core/package.json
+++ b/modules/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/core",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "The luma.gl core Device API",
   "license": "MIT",
   "type": "module",
diff --git a/modules/engine/package.json b/modules/engine/package.json
index 3ee59fbd2a..80c9e4890c 100644
--- a/modules/engine/package.json
+++ b/modules/engine/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/engine",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "3D Engine Components for luma.gl",
   "type": "module",
   "license": "MIT",
@@ -43,7 +43,7 @@
     "@luma.gl/core": "^9.0.0"
   },
   "dependencies": {
-    "@luma.gl/shadertools": "9.0.26",
+    "@luma.gl/shadertools": "9.0.27",
     "@math.gl/core": "^4.0.0",
     "@probe.gl/log": "^4.0.2",
     "@probe.gl/stats": "^4.0.2"
diff --git a/modules/gltf/package.json b/modules/gltf/package.json
index 13777a120f..5fe24fb559 100644
--- a/modules/gltf/package.json
+++ b/modules/gltf/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/gltf",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "glTF support for luma.gl",
   "type": "module",
   "license": "MIT",
@@ -46,7 +46,7 @@
   },
   "dependencies": {
     "@loaders.gl/textures": "^4.2.0",
-    "@luma.gl/shadertools": "9.0.26",
+    "@luma.gl/shadertools": "9.0.27",
     "@math.gl/core": "^4.0.0"
   },
   "gitHead": "e6ff30f654d907e93a0754e82b2e430ea98db033"
diff --git a/modules/shadertools/package.json b/modules/shadertools/package.json
index 0c8809570a..731d412f29 100644
--- a/modules/shadertools/package.json
+++ b/modules/shadertools/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/shadertools",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "Shader module system for luma.gl",
   "type": "module",
   "license": "MIT",
diff --git a/modules/test-utils/package.json b/modules/test-utils/package.json
index 9c2e565b82..15cbbabaeb 100644
--- a/modules/test-utils/package.json
+++ b/modules/test-utils/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/test-utils",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "Automated WebGL testing utilities with Puppeteer and image diffing",
   "type": "module",
   "license": "MIT",
diff --git a/modules/webgl/package.json b/modules/webgl/package.json
index 4222b1ed98..2a3dd7bd90 100644
--- a/modules/webgl/package.json
+++ b/modules/webgl/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/webgl",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "WebGL2 adapter for the luma.gl core API",
   "type": "module",
   "license": "MIT",
@@ -43,7 +43,7 @@
     "@luma.gl/core": "^9.0.0"
   },
   "dependencies": {
-    "@luma.gl/constants": "9.0.26",
+    "@luma.gl/constants": "9.0.27",
     "@probe.gl/env": "^4.0.2"
   },
   "gitHead": "e6ff30f654d907e93a0754e82b2e430ea98db033"
diff --git a/modules/webgpu/package.json b/modules/webgpu/package.json
index 88007651b1..b1a142d285 100644
--- a/modules/webgpu/package.json
+++ b/modules/webgpu/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@luma.gl/webgpu",
-  "version": "9.0.26",
+  "version": "9.0.27",
   "description": "WebGPU adapter for the luma.gl core API",
   "type": "module",
   "license": "MIT",
diff --git a/yarn.lock b/yarn.lock
index 099121b63f..e84ac25639 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2428,7 +2428,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@luma.gl/constants@npm:9.0.26, @luma.gl/constants@workspace:modules/constants":
+"@luma.gl/constants@npm:9.0.27, @luma.gl/constants@workspace:modules/constants":
   version: 0.0.0-use.local
   resolution: "@luma.gl/constants@workspace:modules/constants"
   languageName: unknown
@@ -2477,7 +2477,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@luma.gl/engine@workspace:modules/engine"
   dependencies:
-    "@luma.gl/shadertools": "npm:9.0.26"
+    "@luma.gl/shadertools": "npm:9.0.27"
     "@math.gl/core": "npm:^4.0.0"
     "@probe.gl/log": "npm:^4.0.2"
     "@probe.gl/stats": "npm:^4.0.2"
@@ -2505,7 +2505,7 @@ __metadata:
   resolution: "@luma.gl/gltf@workspace:modules/gltf"
   dependencies:
     "@loaders.gl/textures": "npm:^4.2.0"
-    "@luma.gl/shadertools": "npm:9.0.26"
+    "@luma.gl/shadertools": "npm:9.0.27"
     "@math.gl/core": "npm:^4.0.0"
   peerDependencies:
     "@loaders.gl/core": ^4.2.0
@@ -2526,7 +2526,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@luma.gl/shadertools@npm:9.0.26, @luma.gl/shadertools@workspace:modules/shadertools":
+"@luma.gl/shadertools@npm:9.0.27, @luma.gl/shadertools@workspace:modules/shadertools":
   version: 0.0.0-use.local
   resolution: "@luma.gl/shadertools@workspace:modules/shadertools"
   dependencies:
@@ -2569,7 +2569,7 @@ __metadata:
   version: 0.0.0-use.local
   resolution: "@luma.gl/webgl@workspace:modules/webgl"
   dependencies:
-    "@luma.gl/constants": "npm:9.0.26"
+    "@luma.gl/constants": "npm:9.0.27"
     "@probe.gl/env": "npm:^4.0.2"
   peerDependencies:
     "@luma.gl/core": ^9.0.0