diff --git a/TTS/tts/utils/visual.py b/TTS/tts/utils/visual.py
index 6eb3abdf..17cba648 100644
--- a/TTS/tts/utils/visual.py
+++ b/TTS/tts/utils/visual.py
@@ -17,6 +17,8 @@ def plot_alignment(alignment,
         alignment_ = alignment.detach().cpu().numpy().squeeze()
     else:
         alignment_ = alignment
+    alignment_ = alignment_.astype(
+        np.float32) if alignment_.dtype == np.float16 else alignment_
     fig, ax = plt.subplots(figsize=fig_size)
     im = ax.imshow(alignment_.T,
                    aspect='auto',