diff --git a/html/detector.html b/html/detector.html
index 4c27f20..ce59310 100644
--- a/html/detector.html
+++ b/html/detector.html
@@ -15,7 +15,7 @@ Modern detectors, such as those used at the LHC consist of many components, of w
 
 <h5><span class="badge" style="background:#C5FF82;">&nbsp;</span>&nbsp;Electromagnetic calorimeter</h5>
 <p>
-    The Electromagnetic Calorimeter (ECAL) is used to measur with the energies of electrons and photons.
+    The Electromagnetic Calorimeter (ECAL) is used to measure the energies of electrons and photons.
 </p>
 
 <h5><span class="badge" style="background:#E1FF79;">&nbsp;</span>&nbsp;Hadronic calorimeter</h5>