diff --git a/dotnet/selenium-dotnet-version.bzl b/dotnet/selenium-dotnet-version.bzl
index 679825b8a64ec..aad327babbc0d 100644
--- a/dotnet/selenium-dotnet-version.bzl
+++ b/dotnet/selenium-dotnet-version.bzl
@@ -1,6 +1,6 @@
 # BUILD FILE SYNTAX: STARLARK
 
-SE_VERSION = "4.25.0"
+SE_VERSION = "4.26.0-nightly202409202352"
 ASSEMBLY_VERSION = "4.0.0.0"
 SUPPORTED_NET_STANDARD_VERSIONS = ["netstandard2.0"]
 
diff --git a/java/version.bzl b/java/version.bzl
index 5a9af5146a016..20171265cb335 100644
--- a/java/version.bzl
+++ b/java/version.bzl
@@ -1,2 +1,2 @@
-SE_VERSION = "4.25.0"
+SE_VERSION = "4.26.0-SNAPSHOT"
 TOOLS_JAVA_VERSION = "17"
diff --git a/javascript/node/selenium-webdriver/BUILD.bazel b/javascript/node/selenium-webdriver/BUILD.bazel
index bb6bbc76f686b..1cb3a28ab17ab 100644
--- a/javascript/node/selenium-webdriver/BUILD.bazel
+++ b/javascript/node/selenium-webdriver/BUILD.bazel
@@ -11,7 +11,7 @@ load("//javascript/private:browsers.bzl", "BROWSERS")
 
 npm_link_all_packages(name = "node_modules")
 
-VERSION = "4.25.0"
+VERSION = "4.26.0-nightly202409202352"
 
 BROWSER_VERSIONS = [
     "v85",
diff --git a/javascript/node/selenium-webdriver/package.json b/javascript/node/selenium-webdriver/package.json
index e845e6a9b60cb..fbbd003d28364 100644
--- a/javascript/node/selenium-webdriver/package.json
+++ b/javascript/node/selenium-webdriver/package.json
@@ -1,6 +1,6 @@
 {
   "name": "selenium-webdriver",
-  "version": "4.25.0",
+  "version": "4.26.0-nightly202409202352",
   "description": "The official WebDriver JavaScript bindings from the Selenium project",
   "license": "Apache-2.0",
   "keywords": [
diff --git a/package-lock.json b/package-lock.json
index bde2e3586d80a..e3a0a3154f6ff 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1707,7 +1707,7 @@
       }
     },
     "javascript/node/selenium-webdriver": {
-      "version": "4.25.0-nightly202408281539",
+      "version": "4.26.0-nightly202409202352-nightly202408281539",
       "license": "Apache-2.0",
       "dependencies": {
         "@bazel/runfiles": "^5.8.1",
diff --git a/py/BUILD.bazel b/py/BUILD.bazel
index aae923f62ef01..e2ba6dd2019f1 100644
--- a/py/BUILD.bazel
+++ b/py/BUILD.bazel
@@ -62,7 +62,7 @@ compile_pip_requirements(
     ],
 )
 
-SE_VERSION = "4.25.0"
+SE_VERSION = "4.26.0.dev202409202351"
 
 BROWSER_VERSIONS = [
     "v85",
diff --git a/py/docs/source/conf.py b/py/docs/source/conf.py
index 51a8b71ad4e93..d0f2f6b947180 100644
--- a/py/docs/source/conf.py
+++ b/py/docs/source/conf.py
@@ -56,9 +56,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = '4.25'
+version = '4.26'
 # The full version, including alpha/beta/rc tags.
-release = '4.25.0'
+release = '4.26.0.dev202409202351'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/py/selenium/__init__.py b/py/selenium/__init__.py
index f942ad0bd31c6..e4c5adeea398b 100644
--- a/py/selenium/__init__.py
+++ b/py/selenium/__init__.py
@@ -16,4 +16,4 @@
 # under the License.
 
 
-__version__ = "4.25.0"
+__version__ = "4.26.0.dev202409202351"
diff --git a/py/selenium/webdriver/__init__.py b/py/selenium/webdriver/__init__.py
index 3ddf441b48d56..e61f321c187e0 100644
--- a/py/selenium/webdriver/__init__.py
+++ b/py/selenium/webdriver/__init__.py
@@ -44,7 +44,7 @@
 from .wpewebkit.service import Service as WPEWebKitService  # noqa
 from .wpewebkit.webdriver import WebDriver as WPEWebKit  # noqa
 
-__version__ = "4.25.0"
+__version__ = "4.26.0.dev202409202351"
 
 # We need an explicit __all__ because the above won't otherwise be exported.
 __all__ = [
diff --git a/py/setup.py b/py/setup.py
index b26d640c6571a..9cdd0712f7158 100755
--- a/py/setup.py
+++ b/py/setup.py
@@ -28,7 +28,7 @@
 setup_args = {
     'cmdclass': {'install': install},
     'name': 'selenium',
-    'version': "4.25.0",
+    'version': "4.26.0.dev202409202351",
     'license': 'Apache 2.0',
     'description': 'Official Python bindings for Selenium WebDriver.',
     'long_description': open(join(abspath(dirname(__file__)), "README.rst")).read(),
diff --git a/rb/Gemfile.lock b/rb/Gemfile.lock
index aad3fd1cd39da..446dbdb16d988 100644
--- a/rb/Gemfile.lock
+++ b/rb/Gemfile.lock
@@ -3,7 +3,7 @@ PATH
   specs:
     selenium-devtools (0.129.0)
       selenium-webdriver (~> 4.2)
-    selenium-webdriver (4.25.0)
+    selenium-webdriver (4.26.0.nightly)
       base64 (~> 0.2)
       logger (~> 1.4)
       rexml (~> 3.2, >= 3.2.5)
diff --git a/rb/lib/selenium/webdriver/version.rb b/rb/lib/selenium/webdriver/version.rb
index 1dfb0a3f3623b..e99cd42fa460c 100644
--- a/rb/lib/selenium/webdriver/version.rb
+++ b/rb/lib/selenium/webdriver/version.rb
@@ -19,6 +19,6 @@
 
 module Selenium
   module WebDriver
-    VERSION = '4.25.0'
+    VERSION = '4.26.0.nightly'
   end # WebDriver
 end # Selenium