diff --git a/build.gradle.kts b/build.gradle.kts
index 32cd1a3..eaf2397 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -112,7 +112,7 @@ val shade: Configuration by configurations.creating {
 dependencies {
     val elementaPlatform: String? by project
     val universalPlatform: String? by project
-    val universalVersion = if (platform.isNeoForge || (platform.isForge && platform.mcVersion == 12101))
+    val universalVersion = if (platform.isNeoForge || (platform.isForge && platform.mcVersion >= 12101))
         "363+diamond.neoforge" else libs.versions.universal.get()
     if (platform.isFabric) {
         val fabricApiVersion: String by project
diff --git a/changelog.md b/changelog.md
index ebd661e..55aab9a 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,4 +1,7 @@
 ## Resourcify 1.5.1
+
+- Added support for 1.21.3 neoforge and forge! (Note: at the time of writing kotlin for forge does not have a version
+  marked as compatible for 1.21.3, but **kotlin for forge 5.6.0 seems to work for 1.21.3**)
 - Fixed a crash when opening the changelog of a project in the update screen
 - Fixed a crash caused by a project having an invalid image URL
 
diff --git a/root.gradle.kts b/root.gradle.kts
index b71aff5..39f6467 100644
--- a/root.gradle.kts
+++ b/root.gradle.kts
@@ -32,6 +32,7 @@ preprocess {
     val forge12001 = createNode("1.20.1-forge", 12001, "srg")
     val forge12004 = createNode("1.20.4-forge", 12004, "srg")
     val forge12101 = createNode("1.21.1-forge", 12101, "srg")
+    val forge12103 = createNode("1.21.3-forge", 12103, "srg")
 
     val neoforge12004 = createNode("1.20.4-neoforge", 12004, "srg")
     val neoforge12006 = createNode("1.20.6-neoforge", 12006, "srg")
@@ -56,6 +57,7 @@ preprocess {
     forge12001.link(fabric12001)
     forge12004.link(forge12001)
     forge12101.link(fabric12101)
+    forge12103.link(fabric12103)
 
     neoforge12004.link(forge12004)
     neoforge12006.link(fabric12006)
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 8f51d23..8cde75b 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -69,6 +69,7 @@ listOf(
     "1.21.1-forge",
     "1.21.1-neoforge",
     "1.21.1-fabric",
+    "1.21.3-forge",
     "1.21.3-neoforge",
     "1.21.3-fabric",
 ).forEach { version ->
diff --git a/versions/1.21.3-forge/gradle.properties b/versions/1.21.3-forge/gradle.properties
new file mode 100644
index 0000000..e910e04
--- /dev/null
+++ b/versions/1.21.3-forge/gradle.properties
@@ -0,0 +1,6 @@
+kotlinForForgeVersion=5.3.0
+# Use neoforge versions for normal forge since forge 1.21+ uses normal mojmap like neo
+elementaPlatform=1.20.4-neoforge
+universalPlatform=1.21.3-neoforge
+
+essential.defaults.loom.forge=net.minecraftforge:forge:1.21.3-53.0.9
\ No newline at end of file
diff --git a/versions/1.21.3-forge/src/main/resources/META-INF/accesstransformer.cfg b/versions/1.21.3-forge/src/main/resources/META-INF/accesstransformer.cfg
new file mode 100644
index 0000000..fcdd67c
--- /dev/null
+++ b/versions/1.21.3-forge/src/main/resources/META-INF/accesstransformer.cfg
@@ -0,0 +1,2 @@
+public net.minecraft.server.packs.FilePackResources$SharedZipFileAccess
+public net.minecraft.server.packs.FilePackResources$SharedZipFileAccess file
\ No newline at end of file
diff --git a/versions/1.21.3-forge/src/main/resources/resourcify.accesswidener b/versions/1.21.3-forge/src/main/resources/resourcify.accesswidener
new file mode 100644
index 0000000..30871b1
--- /dev/null
+++ b/versions/1.21.3-forge/src/main/resources/resourcify.accesswidener
@@ -0,0 +1,4 @@
+accessWidener v2 named
+
+accessible class net/minecraft/server/packs/FilePackResources$SharedZipFileAccess
+accessible field net/minecraft/server/packs/FilePackResources$SharedZipFileAccess file Ljava/io/File;
\ No newline at end of file