diff --git a/dna_features_viewer/GraphicRecord/GraphicRecord.py b/dna_features_viewer/GraphicRecord/GraphicRecord.py
index e1a67f2..c04abe2 100644
--- a/dna_features_viewer/GraphicRecord/GraphicRecord.py
+++ b/dna_features_viewer/GraphicRecord/GraphicRecord.py
@@ -7,6 +7,8 @@
 try:
     # Biopython <1.78
     from Bio.Alphabet import DNAAlphabet
+
+    has_dna_alphabet = True
 except ImportError:
     # Biopython >=1.78
     has_dna_alphabet = False
diff --git a/dna_features_viewer/version.py b/dna_features_viewer/version.py
index 131942e..8d1c862 100644
--- a/dna_features_viewer/version.py
+++ b/dna_features_viewer/version.py
@@ -1 +1 @@
-__version__ = "3.0.2"
+__version__ = "3.0.3"