diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 297bb0d..bd3e11b 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,11 +1,8 @@
 [versions]
 junit-jupiter = "5.10.1"
-logback = "1.3.14"
 
 [libraries]
 slf4j-api = { module = "org.slf4j:slf4j-api", version = "2.0.10" }
-logback-core = { module = "ch.qos.logback:logback-core", version.ref = "logback" }
-logback-classic = { module = "ch.qos.logback:logback-classic", version.ref = "logback" }
 gwt-exporter = { module = "org.timepedia.exporter:gwtexporter", version = "2.5.1" }
 junit-jupiter-api = { module = "org.junit.jupiter:junit-jupiter-api", version.ref = "junit-jupiter" }
 junit-jupiter-engine = { module = "org.junit.jupiter:junit-jupiter-engine", version.ref = "junit-jupiter" }
diff --git a/sq12phase/build.gradle.kts b/sq12phase/build.gradle.kts
index 7cecd08..527bb1a 100644
--- a/sq12phase/build.gradle.kts
+++ b/sq12phase/build.gradle.kts
@@ -18,6 +18,5 @@ configureSignatures(publishing)
 attachRemoteRepositories()
 
 dependencies {
-    implementation(libs.logback.core)
-    implementation(libs.logback.classic)
+    implementation(libs.slf4j.api)
 }
diff --git a/threephase/build.gradle.kts b/threephase/build.gradle.kts
index 44196f6..98c741a 100644
--- a/threephase/build.gradle.kts
+++ b/threephase/build.gradle.kts
@@ -19,6 +19,5 @@ attachRemoteRepositories()
 
 dependencies {
     implementation(project(":min2phase"))
-    implementation(libs.logback.core)
-    implementation(libs.logback.classic)
+    implementation(libs.slf4j.api)
 }