diff --git a/gradle.properties b/gradle.properties
index e15616136a3..f12ffa9949d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1 +1 @@
-grails.version=4.1.0.M5
+grails.version=5.0.0.M1
diff --git a/src/en/guide/introduction/whatsNew.adoc b/src/en/guide/introduction/whatsNew.adoc
index 97721684130..b6a3639dace 100644
--- a/src/en/guide/introduction/whatsNew.adoc
+++ b/src/en/guide/introduction/whatsNew.adoc
@@ -1,4 +1,4 @@
-This section covers all the new features introduced in Grails 4.1.0.M5
+This section covers all the new features introduced in Grails 5.0.0.M1
 
 
 
diff --git a/src/en/guide/introduction/whatsNew/dependencyUpgrades.adoc b/src/en/guide/introduction/whatsNew/dependencyUpgrades.adoc
index fa2c794caff..0f5426a1b43 100644
--- a/src/en/guide/introduction/whatsNew/dependencyUpgrades.adoc
+++ b/src/en/guide/introduction/whatsNew/dependencyUpgrades.adoc
@@ -1,4 +1,4 @@
-Grails 4.1.0.M5 ships with the following dependency upgrades:
+Grails 5.0.0.M1 ships with the following dependency upgrades:
 
 * Groovy 3.0.7
 * Micronaut 2.2.1
diff --git a/src/en/guide/toc.yml b/src/en/guide/toc.yml
index edee8d7cdb4..08b6f10d632 100644
--- a/src/en/guide/toc.yml
+++ b/src/en/guide/toc.yml
@@ -1,7 +1,7 @@
 introduction:
   title: Introduction
   whatsNew:
-    title: What's new in Grails 4.1.0.M5?
+    title: What's new in Grails 5.0.0.M1?
     dependencyUpgrades: Updated Dependencies
 gettingStarted:
   title: Getting Started
diff --git a/src/en/guide/upgrading/upgrading40x.adoc b/src/en/guide/upgrading/upgrading40x.adoc
index 8532986afb6..d04eaebdb2a 100644
--- a/src/en/guide/upgrading/upgrading40x.adoc
+++ b/src/en/guide/upgrading/upgrading40x.adoc
@@ -6,13 +6,13 @@ You will need to upgrade your Grails version defined in `gradle.properties` as:
 .gradle.properties
 ----
 ...
-grailsVersion=4.1.0.M5
+grailsVersion=5.0.0.M1
 ...
 ----
 
 ### Apache Groovy 3.0.7
 
-Grails 4.1.0.M4 provide support for Groovy 3. We would recommend you to please check the https://groovy-lang.org/releasenotes/groovy-3.0.html[Release notes for Groovy 3] to update your application in case you are using a specific feature which might not work in Groovy 3.
+Grails 5.0.0.M1 provide support for Groovy 3. We would recommend you to please check the https://groovy-lang.org/releasenotes/groovy-3.0.html[Release notes for Groovy 3] to update your application in case you are using a specific feature which might not work in Groovy 3.
 
 Define groovyVersion in `gradle.properties` to force the application to use Groovy 3.
 
@@ -77,16 +77,16 @@ grailsApplication.config.getProperty("hola", String.class)
 
 ### Spring 5.3
 
-Grails 4.1.0.M5 is built on Spring 5.3.2 See the https://github.com/spring-projects/spring-framework/wiki/Upgrading-to-Spring-Framework-5.x#upgrading-to-version-53[Upgrading to Spring 5.3]  if you are using Spring specific features.
+Grails 5.0.0.M1 is built on Spring 5.3.2 See the https://github.com/spring-projects/spring-framework/wiki/Upgrading-to-Spring-Framework-5.x#upgrading-to-version-53[Upgrading to Spring 5.3]  if you are using Spring specific features.
 
 ### Spring Boot 2.4
 
-Grails 4.1.0.M5 updates to Spring Boot 2.4. Please check https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.4-Release-Notes[Spring Boot 2.4 Release Notes] for more information.
+Grails 5.0.0.M1 updates to Spring Boot 2.4. Please check https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-2.4-Release-Notes[Spring Boot 2.4 Release Notes] for more information.
 
 ### Micronaut 2.0
 
-Grails 4.1.0.M5 is shipped with Micronaut 2.0. Please check the https://docs.micronaut.io/2.2.1/guide/index.html#upgrading[Upgrading to Micronaut 2.x] if you are using a specific feature.
+Grails 5.0.0.M1 is shipped with Micronaut 2.0. Please check the https://docs.micronaut.io/2.2.1/guide/index.html#upgrading[Upgrading to Micronaut 2.x] if you are using a specific feature.
 
 ### Micronaut for Spring 3.0.0
 
-Grails 4.1.0.M5 is updated to Micronaut for Spring 3.0.0, please check out https://github.com/micronaut-projects/micronaut-spring/releases/tag/v3.0.0[release notes] for more information.
+Grails 5.0.0.M1 is updated to Micronaut for Spring 3.0.0, please check out https://github.com/micronaut-projects/micronaut-spring/releases/tag/v3.0.0[release notes] for more information.