diff --git a/CHANGELOG.md b/CHANGELOG.md
index e481520d26..9220baf126 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ This file is used to list changes made in each version of the AWS ParallelCluste
   - openssh-2.11.14 (from openssh-2.11.12)
   - yum-7.4.20 (from yum-7.4.13)
   - yum-epel-5.0.8 (from yum-epel-5.0.2)
+- Upgrade Pmix to 5.0.6 (from 5.0.3).
 
 3.12.0
 ------
diff --git a/cookbooks/aws-parallelcluster-slurm/attributes/slurm_attributes.rb b/cookbooks/aws-parallelcluster-slurm/attributes/slurm_attributes.rb
index 07e2809c3e..d20fdeb0dd 100644
--- a/cookbooks/aws-parallelcluster-slurm/attributes/slurm_attributes.rb
+++ b/cookbooks/aws-parallelcluster-slurm/attributes/slurm_attributes.rb
@@ -13,8 +13,8 @@
 default['cluster']['enable_nss_slurm'] = node['cluster']['directory_service']['enabled']
 
 # PMIX Version and Checksum
-default['cluster']['pmix']['version'] = '5.0.3'
-default['cluster']['pmix']['sha256'] = 'd9b0b81ba45f58f44573796eb05858061ed7f47ea6b29af8058090023e35dfa9'
+default['cluster']['pmix']['version'] = '5.0.6'
+default['cluster']['pmix']['sha256'] = '5a5e0cd36067144e2171d59164d59ea478a2e540ccf4eee4530f55fc6e8cf78b'
 
 # Slurmdbd
 default['cluster']['slurmdbd_service_enabled'] = "true"