diff --git a/gradle.properties b/gradle.properties
index 49e189b340..2119c86024 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -26,7 +26,7 @@ terminalconsoleappender_version=1.2.0
 jline_version=3.12.+
 nightconfig_version=3.6.4
 jetbrains_annotations_version=24.0.1
-slf4j_api_version=2.0.7
+slf4j_api_version=2.0.9
 apache_maven_artifact_version=3.8.5
 jarjar_version=0.4.0
 fancy_mod_loader_version=2.0.17
diff --git a/projects/neoforge/build.gradle b/projects/neoforge/build.gradle
index 6754ae9d9a..49e6d63762 100644
--- a/projects/neoforge/build.gradle
+++ b/projects/neoforge/build.gradle
@@ -87,6 +87,13 @@ dependencies {
     installer ("net.neoforged:JarJarMetadata:${project.jarjar_version}") {
         exclude group: 'org.slf4j'
     }
+    // In 1.20.4, we are accidentally upgrading SLF4J to a newer version than what Minecraft ships.
+    // We need to override the strict version to keep MDG consumers working.
+    installer("org.slf4j:slf4j-api") {
+        version {
+            strictly project.slf4j_api_version
+        }
+    }
 
     compileOnly "org.jetbrains:annotations:${project.jetbrains_annotations_version}"