diff --git a/build.gradle.kts b/build.gradle.kts
index e91fe6c..e4df5a6 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -61,7 +61,7 @@ subprojects {
     dependencies {
         api("com.google.code.findbugs:jsr305:3.0.2")
 
-        testImplementation("com.google.guava:guava:33.4.0-jre")
+        testImplementation("com.google.guava:guava:33.4.6-jre")
         testImplementation("org.testng:testng:7.11.0")
     }
 
diff --git a/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/BatchResTest.kt b/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/BatchResTest.kt
index 03acbd7..c737cb7 100644
--- a/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/BatchResTest.kt
+++ b/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/BatchResTest.kt
@@ -33,7 +33,7 @@ class BatchResTest {
             Assert.assertEquals(link.href, URI("https://some-download.com"))
             Assert.assertEquals(
                 link.header,
-                ImmutableMap.builder<Any?, Any?>()
+                ImmutableMap.builder<Any, Any>()
                     .put("Authorization", "Basic ...")
                     .build()
             )
diff --git a/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/LinkTest.kt b/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/LinkTest.kt
index 56e0a98..e15c2b8 100644
--- a/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/LinkTest.kt
+++ b/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/LinkTest.kt
@@ -22,7 +22,7 @@ class LinkTest {
         Assert.assertNotNull(link)
         Assert.assertEquals(link.href, URI("https://storage-server.com/OID"))
         Assert.assertEquals(link.header,
-                ImmutableMap.builder<Any?, Any?>()
+                ImmutableMap.builder<Any, Any>()
                         .put("Authorization", "Basic ...")
                         .build()
         )
@@ -35,7 +35,7 @@ class LinkTest {
         Assert.assertNotNull(link)
         Assert.assertEquals(link.href, URI("https://api.github.com/lfs/bozaro/git-lfs-java"))
         Assert.assertEquals(link.header,
-                ImmutableMap.builder<Any?, Any?>()
+                ImmutableMap.builder<Any, Any>()
                         .put("Authorization", "RemoteAuth secret")
                         .build()
         )
diff --git a/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/ObjectResTest.kt b/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/ObjectResTest.kt
index 1bc39d1..9a7e339 100644
--- a/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/ObjectResTest.kt
+++ b/gitlfs-common/src/test/kotlin/ru/bozaro/gitlfs/common/data/ObjectResTest.kt
@@ -32,7 +32,7 @@ class ObjectResTest {
         Assert.assertNotNull(link)
         Assert.assertEquals(link.href, URI("https://storage-server.com/OID"))
         Assert.assertEquals(link.header,
-                ImmutableMap.builder<Any?, Any?>()
+                ImmutableMap.builder<Any, Any>()
                         .put("Authorization", "Basic ...")
                         .build()
         )
@@ -49,7 +49,7 @@ class ObjectResTest {
         Assert.assertNotNull(link)
         Assert.assertEquals(link.href, URI("https://some-upload.com"))
         Assert.assertEquals(link.header,
-                ImmutableMap.builder<Any?, Any?>()
+                ImmutableMap.builder<Any, Any>()
                         .put("Authorization", "Basic ...")
                         .build()
         )