diff --git a/Extension/c_cpp_properties.schema.json b/Extension/c_cpp_properties.schema.json
index be23042dac..f81f2752aa 100644
--- a/Extension/c_cpp_properties.schema.json
+++ b/Extension/c_cpp_properties.schema.json
@@ -32,6 +32,11 @@
                             "c89",
                             "c99",
                             "c11",
+                            "c17",
+                            "gnu89",
+                            "gnu99",
+                            "gnu11",
+                            "gnu17",
                             "${default}"
                         ]
                     },
@@ -45,6 +50,12 @@
                             "c++14",
                             "c++17",
                             "c++20",
+                            "gnu++98",
+                            "gnu++03",
+                            "gnu++11",
+                            "gnu++14",
+                            "gnu++17",
+                            "gnu++20",
                             "${default}"
                         ]
                     },
diff --git a/Extension/package.json b/Extension/package.json
index 429b2b30ef..bf80327b85 100644
--- a/Extension/package.json
+++ b/Extension/package.json
@@ -441,7 +441,12 @@
           "enum": [
             "c89",
             "c99",
-            "c11"
+            "c11",
+            "c17",
+            "gnu89",
+            "gnu99",
+            "gnu11",
+            "gnu17"
           ],
           "default": null,
           "description": "%c_cpp.configuration.default.cStandard.description%",
@@ -458,7 +463,13 @@
             "c++11",
             "c++14",
             "c++17",
-            "c++20"
+            "c++20",
+            "gnu++98",
+            "gnu++03",
+            "gnu++11",
+            "gnu++14",
+            "gnu++17",
+            "gnu++20"
           ],
           "default": null,
           "description": "%c_cpp.configuration.default.cppStandard.description%",
diff --git a/Extension/ui/settings.html b/Extension/ui/settings.html
index c2a02208be..3f7f92bc7e 100644
--- a/Extension/ui/settings.html
+++ b/Extension/ui/settings.html
@@ -542,9 +542,14 @@
         <div class="section-text" data-loc-id="c.standard.description">The version of the C language standard to use for IntelliSense.</div>
         <div>
             <select name="inputValue" id="cStandard" class="select-default">
+                <option value="c17">c17</option>
                 <option value="c11">c11</option>
                 <option value="c99">c99</option>
                 <option value="c89">c89</option>
+                <option value="gnu17">gnu17</option>
+                <option value="gnu11">gnu11</option>
+                <option value="gnu99">gnu99</option>
+                <option value="gnu89">gnu89</option>
             </select>
         </div>
     </div>
@@ -560,6 +565,12 @@
                 <option value="c++11">c++11</option>
                 <option value="c++03">c++03</option>
                 <option value="c++98">c++98</option>
+                <option value="gnu++20">gnu++20</option>
+                <option value="gnu++17">gnu++17</option>
+                <option value="gnu++14">gnu++14</option>
+                <option value="gnu++11">gnu++11</option>
+                <option value="gnu++03">gnu++03</option>
+                <option value="gnu++98">gnu++98</option>
             </select>
         </div> 
     </div>