diff --git a/build.gradle b/build.gradle
index 928950ab..2e426c70 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,7 +22,7 @@ if (ENV.BUILD_NUMBER) {
 	build = "release #${ENV.BUILD_NUMBER}"
 	version = baseVersion + '.' + ENV.BUILD_NUMBER
 } else {
-	version = baseVersion + '-forge.39'
+	version = baseVersion + '-forge.40'
 }
 
 configurations {
diff --git a/src/main/java/net/fabricmc/loom/task/AbstractRunTask.java b/src/main/java/net/fabricmc/loom/task/AbstractRunTask.java
index 138bed98..a46d5352 100644
--- a/src/main/java/net/fabricmc/loom/task/AbstractRunTask.java
+++ b/src/main/java/net/fabricmc/loom/task/AbstractRunTask.java
@@ -87,6 +87,7 @@ public abstract class AbstractRunTask extends JavaExec {
 		args(argsSplit);
 		LoomGradleExtension extension = this.getProject().getExtensions().getByType(LoomGradleExtension.class);
 		setWorkingDir(new File(getProject().getRootDir(), extension.runDir));
+		environment(config.envVariables);
 
 		super.exec();
 	}