diff --git a/gradle.lockfile b/gradle.lockfile
index e0184b95..1f39e2ef 100644
--- a/gradle.lockfile
+++ b/gradle.lockfile
@@ -11,8 +11,8 @@ org.embulk:embulk-spi:0.11=compileClasspath
 org.embulk:embulk-util-config:0.5.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-file:0.2.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-json:0.5.0=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-rubytime:0.3.3=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-timestamp:0.2.2=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-rubytime:0.4.0=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-timestamp:0.3.0=compileClasspath,runtimeClasspath
 org.msgpack:msgpack-core:0.8.24=compileClasspath
 org.slf4j:slf4j-api:2.0.7=compileClasspath
 empty=
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 06c34d8d..ad8cae2e 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -15,7 +15,7 @@ jackson = "2.16.2"
 
 embulk-util-file = "0.2.0"
 embulk-util-json = "0.5.0"
-embulk-util-timestamp = "0.2.2"
+embulk-util-timestamp = "0.3.0"
 
 junit4 = "4.13.2"
 embulk-core = "0.11.0"