diff --git a/README.md b/README.md
index 2b7c2555..575f8297 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Allomancy 5.1.0
 
 This mod adds the basics of [Allomancy](http://coppermind.net/wiki/Allomancy) from Brandon Sanderson's book series *Mistborn*.
 
-This mod is currently updated for `Minecraft 1.21` and `NeoForge 21.0.38-beta`
+This mod is currently updated for `Minecraft 1.21` and `NeoForge 21.0.40-beta`
 
 Please verify and report any issues!
 
diff --git a/gradle.properties b/gradle.properties
index 78144b49..c060b233 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -12,9 +12,9 @@ minecraft_version=1.21
 # as they do not follow standard versioning conventions.
 minecraft_version_range=[1.21,1.22)
 # The Neo version must agree with the Minecraft version to get a valid artifact
-neo_version=21.0.38-beta
+neo_version=21.0.40-beta
 # The Neo version range can use any version of Neo as bounds
-neo_version_range=[21.0.38-beta,)
+neo_version_range=[21.0.40-beta,)
 # The loader version range can only use the major version of FML as bounds
 loader_version_range=[4,)
 # read more on this at https://github.com/neoforged/NeoGradle/blob/NG_7.0/README.md#apply-parchment-mappings