diff --git a/scripts/Get-Mutagen.ps1 b/scripts/Get-Mutagen.ps1
index 4de1143..2f64416 100644
--- a/scripts/Get-Mutagen.ps1
+++ b/scripts/Get-Mutagen.ps1
@@ -33,7 +33,7 @@ $goArch = switch ($arch) {
 
 # Download the mutagen binary from our bucket for this platform if we don't have
 # it yet (or it's different).
-$mutagenVersion = "v0.18.3"
+$mutagenVersion = "v0.18.5"
 $mutagenPath = Join-Path $PSScriptRoot "files\mutagen-windows-$($arch).exe"
 $mutagenUrl = "https://storage.googleapis.com/coder-desktop/mutagen/$($mutagenVersion)/mutagen-windows-$($goArch).exe"
 $mutagenEtagFile = $mutagenPath + ".etag"