diff --git a/CHANGELOG.md b/CHANGELOG.md
index c27efb421f..153a086a1c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,9 @@ All notable changes to this project will be documented in this file. Take a look
 
 **Warning:** Features marked as *experimental* may change or be removed in a future release without notice. Use with caution.
 
-## [Unreleased]
+<!-- ## [Unreleased] -->
+
+## [3.1.1]
 
 ### Fixed
 
@@ -968,3 +970,4 @@ progression. Now if no reading progression is set, the `effectiveReadingProgress
 [3.0.2]: https://github.com/readium/kotlin-toolkit/compare/3.0.1...3.0.2
 [3.0.3]: https://github.com/readium/kotlin-toolkit/compare/3.0.2...3.0.3
 [3.1.0]: https://github.com/readium/kotlin-toolkit/compare/3.0.3...3.1.0
+[3.1.1]: https://github.com/readium/kotlin-toolkit/compare/3.1.0...3.1.1
diff --git a/README.md b/README.md
index 97706f29d0..8507fff820 100644
--- a/README.md
+++ b/README.md
@@ -98,7 +98,7 @@ Readium modules are distributed with [Maven Central](https://search.maven.org/se
 
 ```groovy
 buildscript {
-    ext.readium_version = '3.1.0'
+    ext.readium_version = '3.1.1'
 }
 
 allprojects {
diff --git a/gradle.properties b/gradle.properties
index daa52e2870..7eb213feaa 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -6,7 +6,7 @@
 # http://www.gradle.org/docs/current/userguide/build_environment.html
 
 pom.groupId=org.readium.kotlin-toolkit
-pom.version=3.1.0
+pom.version=3.1.1
 
 android.minSdk=21
 android.compileSdk=35
diff --git a/test-app/build.gradle.kts b/test-app/build.gradle.kts
index bdc09fe33a..8b16252de5 100644
--- a/test-app/build.gradle.kts
+++ b/test-app/build.gradle.kts
@@ -20,7 +20,7 @@ android {
 
         applicationId = "org.readium.r2reader"
 
-        versionName = "3.1.0"
+        versionName = "3.1.1"
         versionCode = 1
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"