diff --git a/static/poopGraph.js b/static/poopGraph.js
index c39c13a..df00804 100644
--- a/static/poopGraph.js
+++ b/static/poopGraph.js
@@ -2,6 +2,16 @@ const startInput = document.getElementById('startDate');
 const endInput = document.getElementById('endDate');
 const cutSpikesInput = document.getElementById('cutSpikes');
 
+const initialParamString = window.location.hash.substring(1);
+if (initialParamString) {
+    window.localStorage.setItem("params", initialParamString);
+} else {
+    const savedParamString = window.localStorage.getItem("params");
+    if (savedParamString) {
+        window.location.hash = savedParamString;
+    }
+}
+
 const hashParams = new URLSearchParams(window.location.hash.substring(1));
 startInput.value = hashParams.get('start');
 endInput.value = hashParams.get('end');
@@ -306,7 +316,9 @@ function plot(data) {
         if (!cutSpikesInput.checked) {
             params.set('cutSpikes', 'false');
         }
-        window.location.hash = params.toString();
+        const updatedParamString = params.toString();
+        window.localStorage.setItem("params", updatedParamString);
+        window.location.hash = updatedParamString;
     };
 
     startInput.addEventListener('input', (e) => {