diff --git a/build.gradle b/build.gradle
index 128ca56..8b92a28 100644
--- a/build.gradle
+++ b/build.gradle
@@ -33,8 +33,8 @@ java {
 }
 
 dependencies {
-    compileOnly "org.embulk:embulk-spi:0.11"
-    compileOnly "org.slf4j:slf4j-api:2.0.7"
+    compileOnly libs.embulk.spi
+    compileOnly libs.slf4j
 }
 
 javadoc {
@@ -45,7 +45,7 @@ javadoc {
         encoding = "UTF-8"
         overview = "src/main/html/overview.html"
         links "https://docs.oracle.com/javase/8/docs/api/"
-        links "https://dev.embulk.org/embulk-spi/0.11/javadoc/"
+        links "https://dev.embulk.org/embulk-spi/${libs.versions.embulk.spi.get()}/javadoc/"
     }
 }
 
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..70b5fe7
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,7 @@
+[versions]
+embulk-spi = "0.11"
+slf4j-api = "2.0.7"
+
+[libraries]
+embulk-spi = { group = "org.embulk", name = "embulk-spi", version.ref = "embulk-spi" }
+slf4j = { group = "org.slf4j", name = "slf4j-api", version.ref = "slf4j-api" }
diff --git a/settings-gradle.lockfile b/settings-gradle.lockfile
new file mode 100644
index 0000000..709a43f
--- /dev/null
+++ b/settings-gradle.lockfile
@@ -0,0 +1,4 @@
+# This is a Gradle generated file for dependency locking.
+# Manual edits can break the build and are not advised.
+# This file is expected to be part of source control.
+empty=incomingCatalogForLibs0