diff --git a/benchmark/build.gradle b/benchmark/build.gradle
index 86ed408d..aef86cab 100644
--- a/benchmark/build.gradle
+++ b/benchmark/build.gradle
@@ -21,5 +21,5 @@ dependencies {
     // To serialize java.time.Duration
     implementation "com.fasterxml.jackson.datatype:jackson-datatype-jsr310:$jacksonVersion"
 
-    runtimeOnly "ch.qos.logback:logback-classic:1.3.0"
+    runtimeOnly "ch.qos.logback:logback-classic:1.2.11"
 }
diff --git a/build.gradle b/build.gradle
index 63c9a49e..a10b49f1 100644
--- a/build.gradle
+++ b/build.gradle
@@ -33,7 +33,8 @@ subprojects {
     }
 
     ext {
-        slf4jVersion = "2.0.1"
+        // Freezing this to 1.X until https://github.com/spring-projects/spring-boot/issues/12649 is resolved
+        slf4jVersion = "1.7.36"
         protobufVersion = "3.3.0"
         kafkaVersion = "3.2.0"
         micrometerVersion = "1.7.5"
diff --git a/centraldogma/build.gradle b/centraldogma/build.gradle
index 28d809f5..f01a6e0f 100644
--- a/centraldogma/build.gradle
+++ b/centraldogma/build.gradle
@@ -15,5 +15,5 @@ dependencies {
     implementation "com.fasterxml.jackson.core:jackson-databind:$jacksonVersion"
 
     testImplementation "com.linecorp.centraldogma:centraldogma-testing-junit4:$centralDogmaVersion"
-    testRuntimeOnly "ch.qos.logback:logback-classic:1.3.0"
+    testRuntimeOnly "ch.qos.logback:logback-classic:1.2.11"
 }
diff --git a/processor/build.gradle b/processor/build.gradle
index 88aef672..8aafe7e8 100644
--- a/processor/build.gradle
+++ b/processor/build.gradle
@@ -9,7 +9,7 @@ dependencies {
     implementation "org.slf4j:slf4j-api:$slf4jVersion"
 
     testImplementation project(":protobuf")
-    testRuntimeOnly "ch.qos.logback:logback-classic:1.3.0"
+    testRuntimeOnly "ch.qos.logback:logback-classic:1.2.11"
 
     testFixturesImplementation "junit:junit:$junitVersion"
     testFixturesImplementation "org.apache.kafka:kafka-clients:$kafkaVersion"
diff --git a/testing/build.gradle b/testing/build.gradle
index df08c0a7..92f68f68 100644
--- a/testing/build.gradle
+++ b/testing/build.gradle
@@ -38,5 +38,5 @@ dependencies {
     implementation "junit:junit:$junitVersion"
     implementation "org.hamcrest:hamcrest:$hamcrestVersion"
 
-    runtimeOnly "ch.qos.logback:logback-classic:1.3.0"
+    runtimeOnly "ch.qos.logback:logback-classic:1.2.11"
 }