diff --git a/CHANGELOG.md b/CHANGELOG.md
index 390f91a..ca26729 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,11 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 
 ## [Unreleased]
 
+---
+## [1.2.6] - 2023-12-22
+### Changed
+- Update Delly `v1.1.7` to `v1.2.6`
+
 ---
 
 ## [1.1.7] - 2023-10-04
diff --git a/Dockerfile b/Dockerfile
index 73a31ec..443cd6f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ ARG UBUNTU_VERSION=23.04
 FROM condaforge/mambaforge:${MINIFORGE_VERSION} AS builder
 
 # Use conda to install tools and dependencies into /usr/local
-ARG DELLY_VERSION=1.1.7
+ARG DELLY_VERSION=1.2.6
 RUN mamba create -qy -p /usr/local \
     -c bioconda \
     -c conda-forge \
diff --git a/README.md b/README.md
index f6e6cdd..4326b7c 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ Delly GitHub repository [here](https://github.com/dellytools/delly)
 # Version
 | Tool | Version |
 |------|---------|
-|Delly| 1.1.7|
+|Delly| 1.2.6|
 
 ---
 
diff --git a/metadata.yaml b/metadata.yaml
index a382874..16fa45f 100644
--- a/metadata.yaml
+++ b/metadata.yaml
@@ -4,7 +4,7 @@ description: 'Docker repository for Delly'
 maintainers: ['yupan@mednet.ucla.edu', 'mmootor@mednet.ucla.edu']
 languages: ['Dockerfile']
 tools: ['Delly']
-version: ['1.1.7']
+version: ['1.2.6']
 purpose: 'Delly is an integrated structural variant (SV) prediction method that can discover, genotype and visualize deletions, tandem duplications, inversions and translocations at single-nucleotide resolution in short-read massively parallel sequencing data.'
 references: 'https://github.com/dellytools/delly'
 image_name: 'delly'