diff --git a/ports/jsonnet/0006-use-cxx17.patch b/ports/jsonnet/0006-use-cxx17.patch
new file mode 100644
index 0000000000..31174021a9
--- /dev/null
+++ b/ports/jsonnet/0006-use-cxx17.patch
@@ -0,0 +1,20 @@
+diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
+index e8a0efa..5dfd2e4 100644
+--- a/core/CMakeLists.txt
++++ b/core/CMakeLists.txt
+@@ -34,6 +34,7 @@ if (BUILD_SHARED_BINARIES)
+ add_library(libjsonnet ${LIBJSONNET_HEADERS} ${LIBJSONNET_SOURCE})
+ add_dependencies(libjsonnet stdlib)
+ target_link_libraries(libjsonnet nlohmann_json::nlohmann_json ryml)
++target_compile_features(libjsonnet PRIVATE cxx_std_17)
+ 
+ file(STRINGS ${CMAKE_CURRENT_SOURCE_DIR}/../include/libjsonnet.h JSONNET_VERSION_DEF
+      REGEX "[#]define[ \t]+LIB_JSONNET_VERSION[ \t]+")
+@@ -60,6 +61,7 @@ if (BUILD_STATIC_LIBS)
+     add_library(libjsonnet_static STATIC ${LIBJSONNET_SOURCE})
+     add_dependencies(libjsonnet_static stdlib)
+     target_link_libraries(libjsonnet_static nlohmann_json::nlohmann_json ryml)
++    target_compile_features(libjsonnet_static PRIVATE cxx_std_17)
+     set_target_properties(libjsonnet_static PROPERTIES OUTPUT_NAME jsonnet)
+     install(TARGETS libjsonnet_static DESTINATION "${CMAKE_INSTALL_LIBDIR}")
+     target_include_directories(libjsonnet_static INTERFACE
diff --git a/ports/jsonnet/portfile.cmake b/ports/jsonnet/portfile.cmake
index d6b69831dd..bab4155d96 100644
--- a/ports/jsonnet/portfile.cmake
+++ b/ports/jsonnet/portfile.cmake
@@ -5,8 +5,8 @@ endif()
 vcpkg_from_github(
   OUT_SOURCE_PATH SOURCE_PATH
   REPO google/jsonnet
-  REF v0.18.0
-  SHA512 08a64a4b132df1519292378cef93deb3c60d21636b2a71bce6c13e29cfd93cab465cad77e11f000fb984c5c75a4ca1c92504654fd2e5201343df767ea0e610d1
+  REF "v${VERSION}"
+  SHA512 d46d2521d4389d05f91a16ecd9f181be1853f674a9264e9fac23e413f1084dee947e80682af59603e15e443061a0beb50a30c14c858853e10ed1ae7187d09730
   HEAD_REF master
   PATCHES
     001-enable-msvc.patch
@@ -14,6 +14,7 @@ vcpkg_from_github(
     0003-use-upstream-nlohmann-json.patch
     0004-incorporate-md5.patch
     0005-use-upstream-rapidyaml.patch
+    0006-use-cxx17.patch
 )
 
 # see https://github.com/google/jsonnet/blob/v0.18.0/Makefile#L220
diff --git a/ports/jsonnet/vcpkg.json b/ports/jsonnet/vcpkg.json
index d223594965..9ef7a123b4 100644
--- a/ports/jsonnet/vcpkg.json
+++ b/ports/jsonnet/vcpkg.json
@@ -1,7 +1,6 @@
 {
   "name": "jsonnet",
-  "version": "0.18.0",
-  "port-version": 1,
+  "version": "0.20.0",
   "description": "Jsonnet - The data templating language",
   "homepage": "https://github.com/google/jsonnet",
   "license": "Apache-2.0",
diff --git a/versions/baseline.json b/versions/baseline.json
index 2ddc36236d..e5c0782a7f 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -3589,8 +3589,8 @@
       "port-version": 0
     },
     "jsonnet": {
-      "baseline": "0.18.0",
-      "port-version": 1
+      "baseline": "0.20.0",
+      "port-version": 0
     },
     "jwt-cpp": {
       "baseline": "0.6.0",
diff --git a/versions/j-/jsonnet.json b/versions/j-/jsonnet.json
index 2eb4d1b35f..87af791d67 100644
--- a/versions/j-/jsonnet.json
+++ b/versions/j-/jsonnet.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "d58bf2d0d8b29fbcd87bfa9bcc4725aaec9283ad",
+      "version": "0.20.0",
+      "port-version": 0
+    },
     {
       "git-tree": "d44312d784436a66ae779d4b644aa29e3ebe23e8",
       "version": "0.18.0",