diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 4da65e0a..f88bcd2e 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -95,6 +95,8 @@ jobs:
     - run: |
         git config --global user.name github-actions
         git config --global user.email 41898282+github-actions[bot]@users.noreply.github.com
+    - name: Install advzip for ZIP optimization
+      run: sudo apt install advancecomp
     - name: Setup Gradle
       uses: gradle/actions/setup-gradle@v3
       with:
@@ -118,7 +120,7 @@ jobs:
         VERSION_NAME: ${{ fromJson(steps.split_version.outputs.result).version_name }}
         VERSION_TYPE: ${{ fromJson(steps.split_version.outputs.result).version_type }}
       if: ${{ always() }}
-      run: ./gradlew :$VERSION_NAME:makeZip -Ptype=$VERSION_TYPE
+      run: ./gradlew :$VERSION_NAME:makeZip -Ptype=$VERSION_TYPE -Poptimize_zip=true
     - name: Upload Zip as Artifact
       if: ${{ always() }}
       uses: actions/upload-artifact@v4
diff --git a/build.gradle b/build.gradle
index 3cd459de..ccd9fdde 100644
--- a/build.gradle
+++ b/build.gradle
@@ -781,7 +781,8 @@ subprojects {
         }
     }
 
-    task makeZip(type: Zip, dependsOn: [generateConfiguration]) {
+    def makeZip = tasks.register('makeZip', Zip) {
+        dependsOn generateConfiguration
         archiveBaseName = rootProject.name
         archiveVersion = project.version
         destinationDirectory = file(PATH_BUILD + '/distributions')
@@ -815,6 +816,21 @@ subprojects {
         }
     }
 
+    // This uses advzip: https://linux.die.net/man/1/advzip
+    def optimizeZip = tasks.register('optimizeZip', Exec) {
+        dependsOn makeZip
+        description = "Optimizes the NeoForm ZIP-file in-place"
+        commandLine "advzip", "--recompress", "-k", "-4"
+        argumentProviders.add(
+                objects.newInstance(ZipPathArgumentProvider).tap {
+                    file = makeZip.flatMap(AbstractArchiveTask::getArchiveFile)
+                }
+        )
+    }
+    if (optimize_zip) {
+        makeZip.configure { finalizedBy optimizeZip }
+    }
+
     def componentMaker = objects.newInstance(ComponentMaker)
     def neoformComponent = componentMaker.componentFactory.adhoc('neoform')
     components.add(neoformComponent)
diff --git a/buildSrc/src/main/groovy/net/minecraftforge/mcpconfig/tasks/PathArgumentProvider.groovy b/buildSrc/src/main/groovy/net/minecraftforge/mcpconfig/tasks/PathArgumentProvider.groovy
new file mode 100644
index 00000000..57efc1ac
--- /dev/null
+++ b/buildSrc/src/main/groovy/net/minecraftforge/mcpconfig/tasks/PathArgumentProvider.groovy
@@ -0,0 +1,18 @@
+package net.minecraftforge.mcpconfig.tasks
+
+import org.gradle.api.file.RegularFileProperty
+import org.gradle.api.tasks.InputFile
+import org.gradle.api.tasks.PathSensitive
+import org.gradle.api.tasks.PathSensitivity
+import org.gradle.process.CommandLineArgumentProvider
+
+abstract class ZipPathArgumentProvider implements CommandLineArgumentProvider {
+    @InputFile
+    @PathSensitive(PathSensitivity.RELATIVE)
+    abstract RegularFileProperty getFile()
+
+    @Override
+    Iterable<String> asArguments() {
+        [file.get().asFile.absolutePath]
+    }
+}
diff --git a/gradle.properties b/gradle.properties
index 3620c405..2c7ae5c3 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,3 +1,6 @@
 org.gradle.parallel=true
 org.gradle.caching=true
-org.gradle.configuration-cache=true
\ No newline at end of file
+org.gradle.configuration-cache=true
+
+# Run ZIP optimizations using advzip, which requires the tool to be installed
+optimize_zip=false