diff --git a/build.gradle b/build.gradle
index 1973a2f9a..6ec7f627d 100644
--- a/build.gradle
+++ b/build.gradle
@@ -62,6 +62,19 @@ allprojects { p ->
         mavenCentral()
         // used to download and compile dependencies from git repos
         maven { url 'https://jitpack.io' }
+
+        flatDir {
+            dirs "${rootDir}/mods/fabric"
+            content {
+                includeGroup "fabric-mod"
+            }
+        }
+        flatDir {
+            dirs "${rootDir}/mods/forge"
+            content {
+                includeGroup "forge-mod"
+            }
+        }
     }
 
     tasks.withType(JavaCompile) {
diff --git a/forge/build.gradle b/forge/build.gradle
index 76a55dded..b95dd5258 100644
--- a/forge/build.gradle
+++ b/forge/build.gradle
@@ -36,6 +36,9 @@ repositories {
 dependencies {
     forge "net.minecraftforge:forge:${rootProject.minecraft_version}-${rootProject.forge_version}"
 
+    // Optifine
+//    implementation("forge-mod:OptiFine_1.18.1_HD_U_H4")
+
     // Starlight
 //    implementation("curse.maven:starlight-forge-526854:${project.starlight_version_forge}")
 
diff --git a/mods/forge/OptiFine_1.18.1_HD_U_H4.jar b/mods/forge/OptiFine_1.18.1_HD_U_H4.jar
new file mode 100644
index 000000000..a744b76cf
Binary files /dev/null and b/mods/forge/OptiFine_1.18.1_HD_U_H4.jar differ