Update app.py

app.py

@@ -30,7 +30,7 @@ st.subheader("⚙️ Alignment Parameters")
 match_score = st.slider("Match Score", min_value=1, max_value=5, value=2)
 mismatch_penalty = st.slider("Mismatch Penalty", min_value=-5, max_value=0, value=-1)
 gap_open_penalty = st.slider("Gap Open Penalty", min_value=-5, max_value=0, value=-2)
-gap_extend_penalty = st.slider("Gap Extend Penalty", min_value=-5, max_value=0, value=-0.5)
+gap_extend_penalty = st.slider("Gap Extend Penalty", min_value=-5.0, max_value=0.0, value=-0.5, step=0.1)
 
 # Perform Alignment
 if st.button("🧪 Align Sequences"):