i mean technically this might compile

build.gradle.kts

@@ -4,7 +4,7 @@ plugins {
     java
     `maven-publish`
     id("com.github.johnrengelman.shadow") version "7.1.0" apply false
-    id("io.papermc.paperweight.patcher") version "1.2.0"
+    id("io.papermc.paperweight.patcher") version "1.3.0-SNAPSHOT"
 }
 
 repositories {
@@ -15,8 +15,8 @@ repositories {
 }
 
 dependencies {
-    remapper("net.fabricmc:tiny-remapper:0.6.0:fat")
+    remapper("net.fabricmc:tiny-remapper:0.7.0:fat")
-    decompiler("net.minecraftforge:forgeflower:1.5.498.12")
+    decompiler("net.minecraftforge:forgeflower:1.5.498.22")
     paperclip("io.papermc:paperclip:2.0.1")
 }
 
@@ -26,13 +26,13 @@ subprojects {
 
     java {
         toolchain {
-            languageVersion.set(JavaLanguageVersion.of(16))
+            languageVersion.set(JavaLanguageVersion.of(17))
         }
     }
 
     tasks.withType<JavaCompile>().configureEach {
         options.encoding = "UTF-8"
-        options.release.set(16)
+        options.release.set(17)
     }
 
     repositories {

gradle.properties

@@ -1,10 +1,10 @@
 group = net.pl3x.purpur
-version = 1.17.1-R0.1-SNAPSHOT
+version = 1.18-pre5-R0.1-SNAPSHOT
 
-mcVersion = 1.17.1
+mcVersion = 1.18-pre5
-packageVersion = 1_17_R1
+packageVersion = 1_18_R1
 
-paperCommit = 22aaf913686c8518e375deb01c6cde74942d3ac2
+paperCommit = 9af14f154713661253c908b2a9cb1a822fe6fd4e
 
 org.gradle.caching = true
 org.gradle.parallel = true