diff --git a/.idea/compiler.xml b/.idea/compiler.xml
index 61a9130c..fb7f4a8a 100644
--- a/.idea/compiler.xml
+++ b/.idea/compiler.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="CompilerConfiguration">
-    <bytecodeTargetLevel target="1.8" />
+    <bytecodeTargetLevel target="11" />
   </component>
 </project>
\ No newline at end of file
diff --git a/.idea/gradle.xml b/.idea/gradle.xml
index 23a89bbb..9bba60da 100755
--- a/.idea/gradle.xml
+++ b/.idea/gradle.xml
@@ -7,7 +7,6 @@
         <option name="testRunner" value="PLATFORM" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="1.8" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 6e6363fe..89148552 100755
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -40,7 +40,7 @@
       </value>
     </option>
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_11" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">
diff --git a/.idea/runConfigurations.xml b/.idea/runConfigurations.xml
index 7f68460d..e497da99 100755
--- a/.idea/runConfigurations.xml
+++ b/.idea/runConfigurations.xml
@@ -3,6 +3,7 @@
   <component name="RunConfigurationProducerService">
     <option name="ignoredProducers">
       <set>
+        <option value="com.android.tools.idea.compose.preview.runconfiguration.ComposePreviewRunConfigurationProducer" />
         <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
         <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
         <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
diff --git a/app/build.gradle b/app/build.gradle
index bb42f14d..b0bfcc64 100755
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -118,7 +118,7 @@ dependencies {
     coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
 
     def appcompat_version = "1.2.0"
-    def nav_version = '2.3.4'
+    def nav_version = '2.3.5'
     def exoplayer_version = '2.13.3'
 
     implementation 'com.google.android.material:material:1.4.0-alpha02'
@@ -129,7 +129,7 @@ dependencies {
 
     implementation "androidx.appcompat:appcompat:$appcompat_version"
     implementation "androidx.appcompat:appcompat-resources:$appcompat_version"
-    implementation "androidx.recyclerview:recyclerview:1.2.0-rc01"
+    implementation "androidx.recyclerview:recyclerview:1.2.0"
     implementation 'androidx.swiperefreshlayout:swiperefreshlayout:1.1.0'
     implementation "androidx.viewpager2:viewpager2:1.0.0"
     implementation "androidx.navigation:navigation-fragment:$nav_version"
diff --git a/build.gradle b/build.gradle
index 29536e4d..cf769fff 100755
--- a/build.gradle
+++ b/build.gradle
@@ -5,8 +5,8 @@ buildscript {
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:4.1.3'
-        def nav_version = "2.3.4"
+        classpath 'com.android.tools.build:gradle:4.2.0'
+        def nav_version = "2.3.5"
         classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version"
     }
 }
diff --git a/gradle.properties b/gradle.properties
index 199d16ed..8f97ac54 100755
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,20 +1,16 @@
-# Project-wide Gradle settings.
-# IDE (e.g. Android Studio) users:
-# Gradle settings configured through the IDE *will override*
-# any settings specified in this file.
-# For more details on how to configure your build environment visit
+## For more details on how to configure your build environment visit
 # http://www.gradle.org/docs/current/userguide/build_environment.html
+#
 # Specifies the JVM arguments used for the daemon process.
 # The setting is particularly useful for tweaking memory settings.
-org.gradle.jvmargs=-Xmx1536m
+# Default value: -Xmx1024m -XX:MaxPermSize=256m
+# org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+#
 # When configured, Gradle will run in incubating parallel mode.
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
-# AndroidX package structure to make it clearer which packages are bundled with the
-# Android operating system, and which are packaged with your app's APK
-# https://developer.android.com/topic/libraries/support-library/androidx-rn
-android.useAndroidX=true
-# Automatically convert third-party libraries to use AndroidX
+#Tue May 04 02:33:38 JST 2021
 android.enableJetifier=true
-
+android.useAndroidX=true
+org.gradle.jvmargs=-Xmx2048M -Dkotlin.daemon.jvm.options\="-Xmx1536M"