diff --git a/oni-csharp/oni-csharp.el b/oni-csharp/oni-csharp.el
index d22fb28..64124af 100644
--- a/oni-csharp/oni-csharp.el
+++ b/oni-csharp/oni-csharp.el
@@ -4,7 +4,7 @@
 
 ;; Author: Tom Willemse <tom@ryuslash.org>
 ;; Keywords: local
-;; Version: 2020.0327.170006
+;; Version: 2020.0407.114436
 ;; Package-Requires: (csharp-mode omnisharp oni-company oni-flycheck oni-yasnippet oni-hydra oni-fci smartparens)
 
 ;; This program is free software; you can redistribute it and/or modify
@@ -167,6 +167,12 @@ _cs_: Solution  ^^            _mr_: Reload Solution
 ;;;###autoload
 (add-to-list 'auto-mode-alist '("\\.xaml\\'" . nxml-mode))
 
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.targets\\'" . nxml-mode))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.proj\\'". nxml-mode))
+
 ;;;###autoload
 (add-to-list 'auto-mode-alist '("\\.csproj\\'" . nxml-mode))
 
diff --git a/test/integration/oni-csharp.bats b/test/integration/oni-csharp.bats
index bdfcbd0..ba26d59 100644
--- a/test/integration/oni-csharp.bats
+++ b/test/integration/oni-csharp.bats
@@ -29,3 +29,23 @@
 
     [[ "$output" == *"nxml-mode" ]]
 }
+
+@test "Opening a .proj fiile loads nxml-mode" {
+    run emacs -batch -l package -f package-initialize \
+        -visit test.proj \
+        -eval "(prin1 major-mode)"
+
+    echo "$output"
+
+    [[ "$output" == *"nxml-mode" ]]
+}
+
+@test "Opening a .targets file loads nxml-mode" {
+    run emacs -batch -l package -f packaeg-initialize \
+        -visit test.targets \
+        -eval "(prin1 major-mode)"
+
+    echo "$output"
+
+    [[ "$output" == *"nxml-mode" ]]
+}