diff --git a/ui/src/Components/ManagedSilence/SilenceDetails.js b/ui/src/Components/ManagedSilence/SilenceDetails.js
index 126bdbda9..7a0322e2f 100644
--- a/ui/src/Components/ManagedSilence/SilenceDetails.js
+++ b/ui/src/Components/ManagedSilence/SilenceDetails.js
@@ -58,6 +58,7 @@ const SilenceDetails = ({
               <FontAwesomeIcon
                 className="text-muted mr-1"
                 icon={faCalendarTimes}
+                fixedWidth
               />
               {expiresLabel} <Moment fromNow>{silence.endsAt}</Moment>
             </span>
diff --git a/ui/src/Components/ManagedSilence/__snapshots__/index.test.js.snap b/ui/src/Components/ManagedSilence/__snapshots__/index.test.js.snap
index e1bef58c2..980c6aa0e 100644
--- a/ui/src/Components/ManagedSilence/__snapshots__/index.test.js.snap
+++ b/ui/src/Components/ManagedSilence/__snapshots__/index.test.js.snap
@@ -152,7 +152,7 @@ exports[`<ManagedSilence /> matches snapshot with expaned details 1`] = `
                    focusable=\\"false\\"
                    data-prefix=\\"fas\\"
                    data-icon=\\"calendar-times\\"
-                   class=\\"svg-inline--fa fa-calendar-times fa-w-14 text-muted mr-1\\"
+                   class=\\"svg-inline--fa fa-calendar-times fa-w-14 fa-fw text-muted mr-1\\"
                    role=\\"img\\"
                    xmlns=\\"http://www.w3.org/2000/svg\\"
                    viewbox=\\"0 0 448 512\\"