diff --git a/sls-versions/build.gradle b/sls-versions/build.gradle
index 28ae1466..b6fbaa80 100644
--- a/sls-versions/build.gradle
+++ b/sls-versions/build.gradle
@@ -6,7 +6,7 @@ dependencies {
     compile 'com.fasterxml.jackson.core:jackson-annotations'
     compile 'com.palantir.safe-logging:preconditions'
     compile 'com.palantir.safe-logging:safe-logging'
-    compile 'org.slf4j:slf4j-api'
+    implementation 'com.palantir.safe-logging:logger'
 
     annotationProcessor 'org.immutables:value'
     compileOnly 'org.immutables:value::annotations'
diff --git a/sls-versions/src/main/java/com/palantir/sls/versions/SlsVersionMatcher.java b/sls-versions/src/main/java/com/palantir/sls/versions/SlsVersionMatcher.java
index b87ac73f..bef24950 100644
--- a/sls-versions/src/main/java/com/palantir/sls/versions/SlsVersionMatcher.java
+++ b/sls-versions/src/main/java/com/palantir/sls/versions/SlsVersionMatcher.java
@@ -23,12 +23,12 @@
 import com.fasterxml.jackson.annotation.JsonValue;
 import com.palantir.logsafe.SafeArg;
 import com.palantir.logsafe.UnsafeArg;
+import com.palantir.logsafe.logger.SafeLogger;
+import com.palantir.logsafe.logger.SafeLoggerFactory;
 import java.util.Comparator;
 import java.util.Optional;
 import java.util.OptionalInt;
 import org.immutables.value.Value;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 /**
  * An SLS version matcher as defined by the [SLS
@@ -38,7 +38,7 @@
 @ImmutablesStyle
 public abstract class SlsVersionMatcher {
 
-    private static final Logger log = LoggerFactory.getLogger(SlsVersionMatcher.class);
+    private static final SafeLogger log = SafeLoggerFactory.get(SlsVersionMatcher.class);
 
     private static final Comparator<OptionalInt> EMPTY_IS_GREATER =
             Comparator.comparingInt(num -> num.isPresent() ? num.getAsInt() : Integer.MAX_VALUE);
diff --git a/versions.lock b/versions.lock
index 40234435..f24cf507 100644
--- a/versions.lock
+++ b/versions.lock
@@ -1,15 +1,18 @@
 # Run ./gradlew --write-locks to regenerate this file
 com.fasterxml.jackson.core:jackson-annotations:2.11.1 (2 constraints: bb17a070)
 com.google.code.findbugs:jsr305:3.0.2 (1 constraints: 170aecb4)
-com.google.errorprone:error_prone_annotations:2.5.1 (2 constraints: 1b1bf559)
-com.palantir.safe-logging:preconditions:1.4.0 (1 constraints: 0705fc35)
-com.palantir.safe-logging:safe-logging:1.18.0 (2 constraints: 3c1684f6)
+com.google.errorprone:error_prone_annotations:2.5.1 (5 constraints: ac48316e)
+com.palantir.safe-logging:logger:1.18.0 (1 constraints: 3c05413b)
+com.palantir.safe-logging:logger-slf4j:1.18.0 (1 constraints: 350e9350)
+com.palantir.safe-logging:logger-spi:1.18.0 (2 constraints: 791e0cb1)
+com.palantir.safe-logging:preconditions:1.18.0 (1 constraints: 3c05413b)
+com.palantir.safe-logging:safe-logging:1.18.0 (4 constraints: 52342904)
 net.sf.jopt-simple:jopt-simple:4.6 (1 constraints: 610a91b7)
 org.apache.commons:commons-math3:3.2 (1 constraints: 5c0a8ab7)
 org.immutables:value:2.8.8 (1 constraints: 14051536)
 org.openjdk.jmh:jmh-core:1.32 (1 constraints: 1411a7be)
 org.openjdk.jmh:jmh-generator-annprocess:1.32 (1 constraints: da04f730)
-org.slf4j:slf4j-api:1.7.32 (1 constraints: 3f05473b)
+org.slf4j:slf4j-api:1.7.31 (1 constraints: 471091b6)
 
 [Test dependencies]
 com.fasterxml.jackson.core:jackson-core:2.11.1 (1 constraints: 85123021)
diff --git a/versions.props b/versions.props
index a8e405b9..6f5eb1d5 100644
--- a/versions.props
+++ b/versions.props
@@ -1,8 +1,6 @@
 com.fasterxml.jackson.core:* = 2.11.1
 org.immutables:* = 2.8.8
-org.slf4j:slf4j-api = 1.7.32
-com.palantir.safe-logging:preconditions = 1.4.0
-com.palantir.safe-logging:safe-logging = 1.18.0
+com.palantir.safe-logging:* = 1.18.0
 com.google.guava:guava = 30.1.1-jre
 com.uber.nullaway:nullaway = 0.9.2