diff --git a/ports/immer/CONTROL b/ports/immer/CONTROL
deleted file mode 100644
index f6f736b59a655f..00000000000000
--- a/ports/immer/CONTROL
+++ /dev/null
@@ -1,3 +0,0 @@
-Source: immer
-Version: 2019-06-07
-Description: Postmodern immutable and persistent data structures for C++
diff --git a/ports/immer/portfile.cmake b/ports/immer/portfile.cmake
index 10c1e607337def..c6c2a0bb0c93bb 100644
--- a/ports/immer/portfile.cmake
+++ b/ports/immer/portfile.cmake
@@ -3,25 +3,32 @@
 vcpkg_from_github(
     OUT_SOURCE_PATH SOURCE_PATH
     REPO arximboldi/immer
-    REF fe1d5151f8e62a97a953664f8de39b05ac0d2031
-    SHA512 2f78c2d85a24b2bcb69bbbf8b038c8bacb5a841e0f0ce7e4e521d369423c7d44f803a1c766a77d0955246a1b22476de15fa708a3786f05c41a3b705a574bbb71
+    REF a11df7243cb516a1aeffc83c31366d7259c79e82
+    SHA512 7aefa894d57167e8606ffd20c78490731885da610da084ffdc4ee677e40c7a3b4edcd0fbf74e354fc68866d09ec7a35a7c549f78ce91f2f1a84bb6ccc605e135
     HEAD_REF master
 )
 
-vcpkg_configure_cmake(
-    SOURCE_PATH ${SOURCE_PATH}
-    PREFER_NINJA
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    FEATURES
+        "docs"  immer_BUILD_DOCS
+)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}"
     OPTIONS
         -DENABLE_PYTHON=OFF
         -DENABLE_GUILE=OFF
         -DENABLE_BOOST_COROUTINE=OFF
+        -Dimmer_BUILD_TESTS=OFF
+        -Dimmer_BUILD_EXAMPLES=OFF
+        -Dimmer_BUILD_EXTRAS=OFF
+        ${FEATURE_OPTIONS}
 )
 
-vcpkg_install_cmake()
-
-vcpkg_fixup_cmake_targets(CONFIG_PATH lib/cmake/Immer)
+vcpkg_cmake_install()
+vcpkg_cmake_config_fixup(CONFIG_PATH lib/cmake/Immer)
 
-file(REMOVE_RECURSE ${CURRENT_PACKAGES_DIR}/debug ${CURRENT_PACKAGES_DIR}/lib)
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug" "${CURRENT_PACKAGES_DIR}/lib")
 
 # Handle copyright
-configure_file(${SOURCE_PATH}/LICENSE ${CURRENT_PACKAGES_DIR}/share/${PORT}/copyright COPYONLY)
+file(INSTALL "${SOURCE_PATH}/LICENSE" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}" RENAME copyright)
diff --git a/ports/immer/vcpkg.json b/ports/immer/vcpkg.json
new file mode 100644
index 00000000000000..c52c0f02cf550e
--- /dev/null
+++ b/ports/immer/vcpkg.json
@@ -0,0 +1,21 @@
+{
+  "name": "immer",
+  "version-date": "2021-05-03",
+  "description": "Postmodern immutable and persistent data structures for C++",
+  "homepage": "https://sinusoid.es/immer/",
+  "dependencies": [
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ],
+  "features": {
+    "docs": {
+      "description": "Build documentation"
+    }
+  }
+}
diff --git a/versions/baseline.json b/versions/baseline.json
index b52840b021d60a..80f3894747e1e5 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -2693,7 +2693,7 @@
       "port-version": 0
     },
     "immer": {
-      "baseline": "2019-06-07",
+      "baseline": "2021-05-03",
       "port-version": 0
     },
     "implot": {
diff --git a/versions/i-/immer.json b/versions/i-/immer.json
index 5aa14d0562878b..0ab115f21b67a5 100644
--- a/versions/i-/immer.json
+++ b/versions/i-/immer.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "0ee78459721140ead0ace0a031bbb9d28039b19e",
+      "version-date": "2021-05-03",
+      "port-version": 0
+    },
     {
       "git-tree": "515103042c70e0f9cf8d1518816d09fc6110a669",
       "version-string": "2019-06-07",