diff --git a/cmake/toolchain/heptools-dev-base.cmake b/cmake/toolchain/heptools-dev-base.cmake
index d24f233a093cd9b86f844af7b3e6d185dbdf885d..584b6e23dea57b3e0c55976d88b79f3d3bf59688 100644
--- a/cmake/toolchain/heptools-dev-base.cmake
+++ b/cmake/toolchain/heptools-dev-base.cmake
@@ -339,7 +339,7 @@ LCG_external_package(jpeg              v6b
 LCG_external_package(jsonc             0.12                                     )
 LCG_external_package(jsoncpp           1.9.3                                    )
 LCG_external_package(json_logger       2.0.2                                    )
-LCG_external_package(jsonmcpp          3.10.5                                   )
+LCG_external_package(jsonmcpp          3.11.3                                   )
 LCG_external_package(jsonpatch         1.33                                     )
 LCG_external_package(jsonpointer       2.0                                      )
 LCG_external_package(jsonschema        4.19.2                                   )