diff --git a/package.json b/package.json
index fe5078af..e58a86d5 100644
--- a/package.json
+++ b/package.json
@@ -121,8 +121,8 @@
         "webpack-dev-server": "^4.11.0",
         "webpack-manifest-plugin": "^5.0.0",
         "workbox-webpack-plugin": "^6.5.4",
-        "xterm": "^4.19.0",
-        "xterm-addon-fit": "^0.5.0",
+        "xterm": "^5.0.0",
+        "xterm-addon-fit": "^0.6.0",
         "zen-push": "^0.2.1"
     },
     "scripts": {
diff --git a/src/terminal/Terminal.tsx b/src/terminal/Terminal.tsx
index f2900abd..89a79049 100644
--- a/src/terminal/Terminal.tsx
+++ b/src/terminal/Terminal.tsx
@@ -127,7 +127,9 @@ const Terminal: React.FC = (_props) => {
             foreground: isDarkMode ? 'white' : 'black',
             cursor: isDarkMode ? 'white' : 'black',
             // transparency is needed to work around https://github.com/xtermjs/xterm.js/issues/2808
-            selection: isDarkMode ? 'rgb(81,81,81,0.5)' : 'rgba(181,213,255,0.5)', // this should match AceEditor theme
+            selectionBackground: isDarkMode
+                ? 'rgb(81,81,81,0.5)'
+                : 'rgba(181,213,255,0.5)', // this should match editor theme
         };
     }, [isDarkMode]);
 
diff --git a/yarn.lock b/yarn.lock
index ab9a73d2..1dfb75d4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2536,8 +2536,8 @@ __metadata:
     webpack-dev-server: ^4.11.0
     webpack-manifest-plugin: ^5.0.0
     workbox-webpack-plugin: ^6.5.4
-    xterm: ^4.19.0
-    xterm-addon-fit: ^0.5.0
+    xterm: ^5.0.0
+    xterm-addon-fit: ^0.6.0
     zen-push: ^0.2.1
   languageName: unknown
   linkType: soft
@@ -15744,19 +15744,19 @@ __metadata:
   languageName: node
   linkType: hard
 
-"xterm-addon-fit@npm:^0.5.0":
-  version: 0.5.0
-  resolution: "xterm-addon-fit@npm:0.5.0"
+"xterm-addon-fit@npm:^0.6.0":
+  version: 0.6.0
+  resolution: "xterm-addon-fit@npm:0.6.0"
   peerDependencies:
-    xterm: ^4.0.0
-  checksum: 884d9f360893335c87e4514beeda2af6dbebf38a89b8518f1126d9c4611aefc1598b750bb43a953b79fdf1179c40d70c77a9169ae10f07e0abbbdb39b919b33f
+    xterm: ^5.0.0
+  checksum: 6115e130a58a5ec3d17b424bd0420f3d871e9a6bb455ca62e67c10724534eafbdd205dd35c4707d8037efe8107c09486b48cb4369ba2e3ac97ab78f805195319
   languageName: node
   linkType: hard
 
-"xterm@npm:^4.19.0":
-  version: 4.19.0
-  resolution: "xterm@npm:4.19.0"
-  checksum: 4385e08d6f1e26d0db295ba55f0ed9c304686a72c2cfdd32502cf59de23ae9c93434d469fc3735f44375602f209f767a1ba643a86be6f8e0f1cf7e5bfdccde87
+"xterm@npm:^5.0.0":
+  version: 5.0.0
+  resolution: "xterm@npm:5.0.0"
+  checksum: c2f1d02a708d3d02bebf052dfdf54ecd1b619386bed8f27ed42483d398a3e0bc3595fc855c600db99fd3a91f6d3e8feabe118f1f8f14bbed92d8b3d77277ab92
   languageName: node
   linkType: hard