diff --git a/dsl/common/src/main/groovy/net/neoforged/gradle/dsl/common/tasks/Execute.groovy b/dsl/common/src/main/groovy/net/neoforged/gradle/dsl/common/tasks/Execute.groovy
index 59875cb41..9ce03eb4c 100644
--- a/dsl/common/src/main/groovy/net/neoforged/gradle/dsl/common/tasks/Execute.groovy
+++ b/dsl/common/src/main/groovy/net/neoforged/gradle/dsl/common/tasks/Execute.groovy
@@ -129,6 +129,8 @@ interface Execute extends WithWorkspace, WithOutput, WithJavaVersion, ExecuteSpe
                 java.setWorkingDir(me.getOutputDirectory().get())
                 java.getMainClass().set(mainClass)
                 java.setStandardOutput(log_out)
+
+                java.setMaxHeapSize(String.format("%dk", Runtime.getRuntime().maxMemory() / 1000))
             }).rethrowFailure().assertNormalExitValue()
         }
     }
diff --git a/neoform/src/main/java/net/neoforged/gradle/neoform/runtime/tasks/RecompileSourceJar.java b/neoform/src/main/java/net/neoforged/gradle/neoform/runtime/tasks/RecompileSourceJar.java
index fa44438a9..7225dd668 100644
--- a/neoform/src/main/java/net/neoforged/gradle/neoform/runtime/tasks/RecompileSourceJar.java
+++ b/neoform/src/main/java/net/neoforged/gradle/neoform/runtime/tasks/RecompileSourceJar.java
@@ -101,6 +101,7 @@ public RecompileSourceJar() {
         getOptions().setFork(true);
         getOptions().setIncremental(true);
         getOptions().getIncrementalAfterFailure().set(true);
+        getOptions().getForkOptions().setMemoryMaximumSize(String.format("%dk", java.lang.Runtime.getRuntime().maxMemory() / 1000));
 
         //Leave this as an anon class, so that gradle is aware of this. Lambdas can not be used during task tree analysis.
         //noinspection Convert2Lambda