diff --git a/src/.docker_modules/kb/0.26.3/Dockerfile b/src/.docker_modules/kb/0.26.3/Dockerfile
index 9249cfc3729b499d9943a08d69119688eb5a154d..5cd35dfae7d474b25223ebeca80fe6adada91db3 100644
--- a/src/.docker_modules/kb/0.26.3/Dockerfile
+++ b/src/.docker_modules/kb/0.26.3/Dockerfile
@@ -3,8 +3,7 @@ FROM python:3.9-slim
 ENV KB_VERSION="0.26.3"
 
 RUN apt update && apt install -y procps make gcc zlib1g-dev libbz2-dev  	libcurl4 liblzma-dev \
-        && pip install --upgrade pip \
-        && pip3 install anndata h5py Jinja2 loompy nbconvert nbformat ngs-tools numpy pandas plotly scanpy scikit-learn tqdm \
+        && pip3 install pysam anndata h5py Jinja2 loompy nbconvert nbformat ngs-tools numpy pandas plotly scanpy scikit-learn tqdm \
         && pip3 install kb-python==${KB_VERSION} gffutils
 
 COPY t2g.py /usr/bin/
diff --git a/src/nf_modules/kb/main.nf b/src/nf_modules/kb/main.nf
index f7cf0e0841a65ebf692946a39cf67eb2f4f9f963..a6cbfa759925b1bdff0abde20f1942ca40a22b7a 100644
--- a/src/nf_modules/kb/main.nf
+++ b/src/nf_modules/kb/main.nf
@@ -1,4 +1,4 @@
-version = "0.26.3"
+version = "0.26.0"
 container_url = "lbmc/kb:${version}"
 
 params.index_fasta = ""