diff --git a/ippisite/ippidb/templates/base.html b/ippisite/ippidb/templates/base.html
index e62186fa25edc48b09bae2639d7f4e47276ab7b8..557cfe8c0f454147b6685c9ab33dba7d9f3fc268 100644
--- a/ippisite/ippidb/templates/base.html
+++ b/ippisite/ippidb/templates/base.html
@@ -130,6 +130,7 @@
                     type: 'scatter',
                     data: scatterData,
                     options: {
+                        maintainAspectRatio: true,
                         scales: {
                             xAxes: [{
                                 type: 'linear',
diff --git a/ippisite/ippidb/templates/compound_card.html b/ippisite/ippidb/templates/compound_card.html
index 1931340e52d1880be1c40eda767e95d6939601da..3a8b425dd8b4d9bd7e1fee98d8ecf9942b37a429 100644
--- a/ippisite/ippidb/templates/compound_card.html
+++ b/ippisite/ippidb/templates/compound_card.html
@@ -162,7 +162,7 @@
               <h5 class="card-header">PCA : iPPI-DB chemical space</h5>
               <div class="card-body">
 
-              <canvas id="pca_biplot"></canvas>
+              <canvas id="pca_biplot" style="width:600px; height:600px;"></canvas>
               <script>
                 drawCompoundsBiplotChart('pca_biplot', {{ compound.id }}, '{{ compound.best_pXC50_activity_ppi_family|default_if_none:"No target family identified" }}', {{ pca_biplot_data | safe }}, 'physicochemistry');
               </script>