diff --git a/README.md b/README.md
index efe04f6..16e0b59 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,9 @@ for Efficient Numerical Computation, Computing in Science \& Engineering. Volume
 [2 SciPy python library. Travis E. Oliphant, SciPy: Open source scientific tools for Python,
 Computing in Science and Engineering, Volume 9, (10-20) 2007
 
+Installation
+------------
+$ conda install -c neutronimaging neunorm
 
 Meta
 ----
diff --git a/src/NeuNorm/_version.py b/src/NeuNorm/_version.py
deleted file mode 100644
index 8cf4a70..0000000
--- a/src/NeuNorm/_version.py
+++ /dev/null
@@ -1 +0,0 @@
-__version__ = "1.6.8.dev1"
diff --git a/src/NeuNorm/normalization.py b/src/NeuNorm/normalization.py
index d4a5da4..21c4357 100644
--- a/src/NeuNorm/normalization.py
+++ b/src/NeuNorm/normalization.py
@@ -312,9 +312,13 @@ def _auto_gamma_filtering(self, data=None):
         # we may be dealing with a float time, that means it does not need any gamma filtering
 
         try:
-            max = np.iinfo(data.dtype).max
-        except Exception as e:
-            logging.warning(f"Use default max value for data type: {e}")
+            data_type = data.dtype
+            if data_type in [float, "float32"]:
+                max = np.finfo(data_type).max
+            else:
+                max = np.iinfo(data.dtype).max
+        except Exception as error:
+            logging.warning(f"Use default max value for data type: {error}")
             return data
 
         manual_gamma_threshold = max - 5