2 files changed, 9 insertions, 2 deletions

diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index fbc71bdc..c0372cad 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -30,6 +30,7 @@ mockito-junit = { group = "org.mockito", name = "mockito-junit-jupiter", version
 mwe-utils = { group = "org.eclipse.emf", name = "org.eclipse.emf.mwe.utils", version = "1.6.2.M1" }
 mwe2-launch = { group = "org.eclipse.emf", name = "org.eclipse.emf.mwe2.launch", version.ref = "mwe2" }
 mwe2-lib = { group = "org.eclipse.emf", name = "org.eclipse.emf.mwe2.lib", version.ref = "mwe2" }
+slf4j-api = { group = "org.slf4j", name = "slf4j-api", version.ref = "slf4j" }
 slf4j-simple = { group = "org.slf4j", name = "slf4j-simple", version.ref = "slf4j" }
 slf4j-log4j = { group = "org.slf4j", name = "log4j-over-slf4j", version.ref = "slf4j" }
 viatra = { group = "org.eclipse.viatra", name = "viatra-query-runtime", version = "2.6.0" }
diff --git a/subprojects/language-web/build.gradle b/subprojects/language-web/build.gradle
index 6be4d5e8..a1d4753a 100644
--- a/subprojects/language-web/build.gradle
+++ b/subprojects/language-web/build.gradle
@@ -8,18 +8,24 @@ configurations {
                 canBeConsumed = false
                 canBeResolved = true
         }
+        
+        all {
+                // Use log4j-over-slf4j instead of log4j 1.x
+                exclude group: 'log4j', module: 'log4j'
+        }
 }
 
 dependencies {
         implementation project(':refinery-language')
         implementation project(':refinery-language-ide')
-        implementation libs.xtend.lib
-        implementation libs.xtext.web
         implementation libs.jetty.server
         implementation libs.jetty.servlet
         implementation libs.jetty.websocket.server
+        implementation libs.slf4j.api
         implementation libs.slf4j.simple
         implementation libs.slf4j.log4j
+        implementation libs.xtend.lib
+        implementation libs.xtext.web
         webapp project(path: ':refinery-frontend', configuration: 'productionAssets')
         testImplementation testFixtures(project(':refinery-language'))
         testImplementation libs.jetty.websocket.client