diff --git a/CHANGELOG.md b/CHANGELOG.md
index 64e879a0..d4aaca37 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@ SPDX-License-Identifier: CC0-1.0
 
 # PGPainless Changelog
 
+
 ## 2.0.0-SNAPSHOT
 - Bump `bcpg-jdk8on` to `1.77`
 - Bump `bcprov-jdk18on` to `1.77`
@@ -23,6 +24,9 @@ SPDX-License-Identifier: CC0-1.0
   - `GNUPG_AEAD_ENCRYPTED_DATA` -> `LIBREPGP_OCB_ENCRYPTED_DATA`
   - `GNUPG_VERSION_5_PUBLIC_KEY` -> `LIBREPGP_VERSION_5_PUBLIC_KEY`
 
+## 1.6.6
+- Downgrade `logback-core` and `logback-classic` to `1.2.13` to fix #426
+
 ## 1.6.5
 - Add `SecretKeyRingEditor.setExpirationDateOfSubkey()`
 
diff --git a/README.md b/README.md
index 659ca896..484234d8 100644
--- a/README.md
+++ b/README.md
@@ -191,7 +191,7 @@ repositories {
 }
 
 dependencies {
-	implementation 'org.pgpainless:pgpainless-core:1.6.2'
+	implementation 'org.pgpainless:pgpainless-core:1.6.6'
 }
 ```
 
diff --git a/pgpainless-sop/README.md b/pgpainless-sop/README.md
index 55cf0cb2..e31f993b 100644
--- a/pgpainless-sop/README.md
+++ b/pgpainless-sop/README.md
@@ -23,7 +23,7 @@ To start using pgpainless-sop in your code, include the following lines in your
 ...
 dependencies {
     ...
-    implementation "org.pgpainless:pgpainless-sop:1.6.2"
+    implementation "org.pgpainless:pgpainless-sop:1.6.6"
     ...
 }
 
@@ -34,7 +34,7 @@ dependencies {
     <dependency>
         <groupId>org.pgpainless</groupId>
         <artifactId>pgpainless-sop</artifactId>
-        <version>1.6.2</version>
+        <version>1.6.6</version>
     </dependency>
     ...
 </dependencies>
diff --git a/version.gradle b/version.gradle
index 2f15c7ab..4ec395ef 100644
--- a/version.gradle
+++ b/version.gradle
@@ -4,7 +4,7 @@
 
 allprojects {
     ext {
-        shortVersion = '1.6.3'
+        shortVersion = '1.6.7'
         isSnapshot = true
         pgpainlessMinAndroidSdk = 10
         javaSourceCompatibility = 1.8