diff --git a/Dockerfile b/Dockerfile
index b25bed0..b0e9ca7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,9 +30,10 @@ ENV SPM_VERSION 12
 ENV SPM_REVISION r7771
 ENV MCR_INHIBIT_CTF_LOCK 1
 ENV SPM_HTML_BROWSER 0
-ENV CAT_VERSION 12.8.2
-ENV CAT_REVISION r2166
-ENV CAT_FULLVERSION CAT${CAT_VERSION}_${CAT_REVISION}
+ENV CAT_VERSION 12.9
+ENV CAT_REVISION r2556
+#ENV CAT_FULLVERSION CAT${CAT_VERSION}_${CAT_REVISION}
+ENV CAT_FULLVERSION CAT${CAT_VERSION}
 ENV CAT_PATH /opt/spm/spm12_mcr/home/gaser/gaser/spm/spm12/toolbox/cat12
 RUN wget --progress=bar:force -P /tmp http://www.neuro.uni-jena.de/cat12/${CAT_FULLVERSION}_${MATLAB_VERSION}_MCR_Linux.zip \
  && unzip -q /tmp/${CAT_FULLVERSION}_${MATLAB_VERSION}_MCR_Linux.zip -d /opt \
diff --git a/README.md b/README.md
index eabe7e9..0f0e638 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ Components
 * Ubuntu 20.04 LTS (Focal Fossa)
 * MATLAB Compiler Runtime R2017b (version 9.3)
 * SPM standalone version (SPM12 r7771)
-* CAT toolbox (CAT12.8.2 r2166)
+* CAT toolbox (CAT12.9 r2556)
 
 Usage
 -----