diff --git a/README.md b/README.md
index 1bdf7f9..2e74966 100644
--- a/README.md
+++ b/README.md
@@ -99,8 +99,8 @@ running](http://www.icegreen.com/greenmail/#deploy_docker_standalone). The
 easiest way to do that is with Docker:
 
 ```console
-$ docker pull greenmail/standalone:1.6.2
-$ docker run -t -i -e GREENMAIL_OPTS='-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose' -p 3025:3025 -p 3110:3110 -p 3143:3143 -p 3465:3465 -p 3993:3993 -p 3995:3995 greenmail/standalone:1.6.2
+$ docker pull greenmail/standalone:1.6.3
+$ docker run -t -i -e GREENMAIL_OPTS='-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose' -p 3025:3025 -p 3110:3110 -p 3143:3143 -p 3465:3465 -p 3993:3993 -p 3995:3995 greenmail/standalone:1.6.3
 ```
 
 ## License
diff --git a/README.tpl b/README.tpl
index 1d9ea49..2139e46 100644
--- a/README.tpl
+++ b/README.tpl
@@ -20,8 +20,8 @@ running](http://www.icegreen.com/greenmail/#deploy_docker_standalone). The
 easiest way to do that is with Docker:
 
 ```console
-$ docker pull greenmail/standalone:1.6.2
-$ docker run -t -i -e GREENMAIL_OPTS='-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose' -p 3025:3025 -p 3110:3110 -p 3143:3143 -p 3465:3465 -p 3993:3993 -p 3995:3995 greenmail/standalone:1.5.9
+$ docker pull greenmail/standalone:1.6.3
+$ docker run -t -i -e GREENMAIL_OPTS='-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose' -p 3025:3025 -p 3110:3110 -p 3143:3143 -p 3465:3465 -p 3993:3993 -p 3995:3995 greenmail/standalone:1.6.3
 ```
 
 ## License
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 50a2158..8a1ae9a 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -85,7 +85,7 @@ resources:
       endpoint: jonhoo
   containers:
    - container: greenmail
-     image: greenmail/standalone:1.6.2
+     image: greenmail/standalone:1.6.3
      ports:
        - 3025:3025
        - 3110:3110
diff --git a/src/parse.rs b/src/parse.rs
index b4871ca..806fbab 100644
--- a/src/parse.rs
+++ b/src/parse.rs
@@ -326,7 +326,7 @@ pub fn parse_ids(
     lines: &[u8],
     unsolicited: &mut mpsc::Sender<UnsolicitedResponse>,
 ) -> Result<HashSet<u32>> {
-    let mut lines = &lines[..];
+    let mut lines = lines;
     let mut ids = HashSet::new();
     loop {
         if lines.is_empty() {