diff --git a/CHANGELOG.md b/CHANGELOG.md
index cc8b2507..a7895ec3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@
 ## BUG FIXES
 
 * Fix the component paths, build paths and `rename_keys` separator in the helper scripts, which prevented `scripts/create_datasets/test_resources.sh` and both `run_test.sh` scripts from running at all (PR #22).
+* 
+* `cellmapper_scvi`: Fix postfix due to breaking changes in package (PR #23).
 
 # task_predict_modality 0.1.1
 
diff --git a/src/methods/cellmapper_scvi/script.py b/src/methods/cellmapper_scvi/script.py
index b0d2aa79..ef873109 100644
--- a/src/methods/cellmapper_scvi/script.py
+++ b/src/methods/cellmapper_scvi/script.py
@@ -69,7 +69,7 @@
 cmap.compute_mapping_matrix(kernel_method=par['kernel_method'])
 
 print("Predict on test data", flush=True)
-cmap.map_obsm(key="mod2", prediction_postfix="pred")
+cmap.map_obsm(key="mod2", prediction_postfix="_pred")
 mod2_pred = csc_matrix(cmap.query.obsm["mod2_pred"])
 
 print("Write output AnnData to file", flush=True)