diff --git a/setup.cfg b/setup.cfg
index 27f07b8..149db93 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = metabo_adni
-version = 0.5.0
+version = 0.5.1
 
 [options]
 package_dir =
diff --git a/src/metabo_adni/qc/transformations.py b/src/metabo_adni/qc/transformations.py
index 5b29ca4..1fc837e 100644
--- a/src/metabo_adni/qc/transformations.py
+++ b/src/metabo_adni/qc/transformations.py
@@ -91,7 +91,7 @@ def log2(dat_dict: dict[str, pd.DataFrame],
                                                   key)
         indices = load._get_data_indices(dat_dict[key], platform)
         dat = dat_dict[key].loc[indices, metabo_names]
-        log2_dat = np.log2(dat)
+        log2_dat = np.log2(dat + 1)
         dat_dict[key].loc[indices, metabo_names] = log2_dat
     print('')
     return dat_dict