diff --git a/build.gradle b/build.gradle
index a0e228bc..2c45435f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -6,7 +6,7 @@ plugins {
     id "maven-publish"
     id "signing"
     id 'checkstyle'
-    id "org.embulk.embulk-plugins" version "0.6.1" apply false
+    id "org.embulk.embulk-plugins" version "0.6.2" apply false
 }
 
 allprojects {
@@ -46,7 +46,7 @@ subprojects {
     dependencies {
         compileOnly "org.embulk:embulk-spi:0.10.49"
 
-        implementation("org.embulk:embulk-util-config:0.3.3") {
+        implementation("org.embulk:embulk-util-config:0.3.4") {
             // They conflict with embulk-core. They are once excluded here,
             // and added explicitly with versions exactly the same with embulk-core:0.10.31.
             exclude group: "com.fasterxml.jackson.core", module: "jackson-annotations"
@@ -64,7 +64,7 @@ subprojects {
         implementation "com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.6.7"
         implementation "javax.validation:validation-api:1.1.0.Final"
 
-        implementation "org.embulk:embulk-util-json:0.2.1"
+        implementation "org.embulk:embulk-util-json:0.3.0"
         implementation "org.embulk:embulk-util-timestamp:0.2.2"
         implementation "org.embulk:embulk-util-retryhelper:0.8.2"
 
@@ -140,6 +140,7 @@ subprojects {
                             // http://central.sonatype.org/pages/requirements.html#license-information
                             name = "The Apache License, Version 2.0"
                             url = "https://www.apache.org/licenses/LICENSE-2.0.txt"
+                            distribution = "repo"
                         }
                     }
 
diff --git a/embulk-output-jdbc/gradle.lockfile b/embulk-output-jdbc/gradle.lockfile
index ea1d623f..77549b9f 100644
--- a/embulk-output-jdbc/gradle.lockfile
+++ b/embulk-output-jdbc/gradle.lockfile
@@ -7,8 +7,8 @@ com.fasterxml.jackson.core:jackson-databind:2.6.7.5=compileClasspath,runtimeClas
 com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.6.7=compileClasspath,runtimeClasspath
 javax.validation:validation-api:1.1.0.Final=compileClasspath,runtimeClasspath
 org.embulk:embulk-spi:0.10.49=compileClasspath
-org.embulk:embulk-util-config:0.3.3=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-json:0.2.1=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-config:0.3.4=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-json:0.3.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-retryhelper:0.8.2=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-rubytime:0.3.3=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-timestamp:0.2.2=compileClasspath,runtimeClasspath
diff --git a/embulk-output-mysql/gradle.lockfile b/embulk-output-mysql/gradle.lockfile
index cf024ec6..8e0e0508 100644
--- a/embulk-output-mysql/gradle.lockfile
+++ b/embulk-output-mysql/gradle.lockfile
@@ -8,8 +8,8 @@ com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.6.7=compileClasspath,runt
 javax.validation:validation-api:1.1.0.Final=compileClasspath,runtimeClasspath
 mysql:mysql-connector-java:5.1.44=compileClasspath
 org.embulk:embulk-spi:0.10.49=compileClasspath
-org.embulk:embulk-util-config:0.3.3=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-json:0.2.1=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-config:0.3.4=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-json:0.3.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-retryhelper:0.8.2=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-rubytime:0.3.3=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-timestamp:0.2.2=compileClasspath,runtimeClasspath
diff --git a/embulk-output-postgresql/gradle.lockfile b/embulk-output-postgresql/gradle.lockfile
index 6ffd5e7d..b5aac5a4 100644
--- a/embulk-output-postgresql/gradle.lockfile
+++ b/embulk-output-postgresql/gradle.lockfile
@@ -7,8 +7,8 @@ com.fasterxml.jackson.core:jackson-databind:2.6.7.5=compileClasspath,runtimeClas
 com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.6.7=compileClasspath,runtimeClasspath
 javax.validation:validation-api:1.1.0.Final=compileClasspath,runtimeClasspath
 org.embulk:embulk-spi:0.10.49=compileClasspath
-org.embulk:embulk-util-config:0.3.3=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-json:0.2.1=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-config:0.3.4=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-json:0.3.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-retryhelper:0.8.2=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-rubytime:0.3.3=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-timestamp:0.2.2=compileClasspath,runtimeClasspath
diff --git a/embulk-output-redshift/gradle.lockfile b/embulk-output-redshift/gradle.lockfile
index 232fcc55..7e6eba12 100644
--- a/embulk-output-redshift/gradle.lockfile
+++ b/embulk-output-redshift/gradle.lockfile
@@ -19,8 +19,8 @@ org.apache.httpcomponents:httpclient:4.5.5=compileClasspath,runtimeClasspath
 org.apache.httpcomponents:httpcore:4.4.9=compileClasspath,runtimeClasspath
 org.embulk:embulk-spi:0.10.49=compileClasspath
 org.embulk:embulk-util-aws-credentials:0.4.2=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-config:0.3.3=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-json:0.2.1=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-config:0.3.4=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-json:0.3.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-retryhelper:0.8.2=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-rubytime:0.3.3=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-timestamp:0.2.2=compileClasspath,runtimeClasspath
diff --git a/embulk-output-sqlserver/gradle.lockfile b/embulk-output-sqlserver/gradle.lockfile
index 8b171993..13595e74 100644
--- a/embulk-output-sqlserver/gradle.lockfile
+++ b/embulk-output-sqlserver/gradle.lockfile
@@ -12,8 +12,8 @@ com.microsoft.sqlserver:mssql-jdbc:7.2.2.jre8=compileClasspath,runtimeClasspath
 javax.validation:validation-api:1.1.0.Final=compileClasspath,runtimeClasspath
 net.sourceforge.jtds:jtds:1.3.1=compileClasspath,runtimeClasspath
 org.embulk:embulk-spi:0.10.49=compileClasspath
-org.embulk:embulk-util-config:0.3.3=compileClasspath,runtimeClasspath
-org.embulk:embulk-util-json:0.2.1=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-config:0.3.4=compileClasspath,runtimeClasspath
+org.embulk:embulk-util-json:0.3.0=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-retryhelper:0.8.2=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-rubytime:0.3.3=compileClasspath,runtimeClasspath
 org.embulk:embulk-util-timestamp:0.2.2=compileClasspath,runtimeClasspath
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 943f0cbf..afba1092 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 50832291..c7d437bb 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,6 +1,6 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6.4-bin.zip
 networkTimeout=10000
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists