diff --git a/CMakeLists.txt b/CMakeLists.txt
index e61b8b4..bc058da 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,27 +37,26 @@ if(NOT TARGET tl::expected)
 endif()
 list(APPEND OCPPI_LINK_LIBRARIES PUBLIC tl::expected)
 
-set(OCPPI_JSON_MINIMAL_VERSION 3.11.2)
+set(OCPPI_JSON_MINIMAL_VERSION 3.5.0) # debian buster
 CPMFindPackage(
   NAME nlohmann_json
   VERSION "${OCPPI_JSON_MINIMAL_VERSION}"
-  URL "https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz"
+  URL "https://github.com/nlohmann/json/archive/refs/tags/v3.5.0.tar.gz"
   EXCLUDE_FROM_ALL ON)
 list(APPEND OCPPI_LINK_LIBRARIES PUBLIC nlohmann_json::nlohmann_json)
 
-set(OCPPI_SPDLOG_MINIMAL_VERSION 1.10.0)
+set(OCPPI_SPDLOG_MINIMAL_VERSION 1.3.1) # debian buster
 if(OCPPI_WITH_SPDLOG)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DOCPPI_WITH_SPDLOG")
   CPMFindPackage(
     NAME spdlog
     VERSION ${OCPPI_SPDLOG_MINIMAL_VERSION}
     GITHUB_REPOSITORY "gabime/spdlog"
-    GIT_TAG "v1.13.0"
+    GIT_TAG "v1.3.1"
     GIT_SHALLOW ON
     EXCLUDE_FROM_ALL ON
-    OPTIONS
-      "CMAKE_POSITION_INDEPENDENT_CODE ON" # NOTE:
-                                           # https://github.com/gabime/spdlog/issues/1190
+    OPTIONS "CMAKE_POSITION_INDEPENDENT_CODE ON" # NOTE:
+            # https://github.com/gabime/spdlog/issues/1190
   )
   list(APPEND OCPPI_LINK_LIBRARIES PRIVATE spdlog::spdlog)
 endif()
diff --git a/CMakePresets.json b/CMakePresets.json
index f493997..6f7c6bd 100644
--- a/CMakePresets.json
+++ b/CMakePresets.json
@@ -10,9 +10,10 @@
                         "name": "debug",
                         "displayName": "Debug configuration",
                         "description": "Configure ocppi for development and debugging.",
-                        "binaryDir": "${sourceDir}/build-debug",
+                        "binaryDir": "${sourceDir}/build",
                         "cacheVariables": {
                                 "CPM_DOWNLOAD_ALL": true,
+                                "OCPPI_WITH_SPDLOG": true,
                                 "CMAKE_CXX_FLAGS": "-Wall -Wextra -Wpedantic -Og -g -fsanitize=address,undefined",
                                 "CMAKE_EXPORT_COMPILE_COMMANDS": true,
                                 "CMAKE_COLOR_DIAGNOSTICS": true
@@ -35,8 +36,6 @@
                         "description": "Configure ocppi with spdlog for CI.",
                         "binaryDir": "${sourceDir}/build-ci-with-spdlog",
                         "cacheVariables": {
-                                "CPM_LOCAL_PACKAGES_ONLY": true,
-                                "CMAKE_BUILD_TYPE": "Release",
                                 "OCPPI_WITH_SPDLOG": true
                         }
                 }
diff --git a/examples/parse-config/src/main.cpp b/examples/parse-config/src/main.cpp
index 2f7bb13..2cf27d3 100644
--- a/examples/parse-config/src/main.cpp
+++ b/examples/parse-config/src/main.cpp
@@ -5,7 +5,6 @@
 #include <string_view>
 
 #include "nlohmann/json.hpp"
-#include "nlohmann/json_fwd.hpp"
 #include "ocppi/runtime/config/types/Config.hpp"
 #include "ocppi/runtime/config/types/Generators.hpp" // IWYU pragma: keep
 
diff --git a/examples/using-crun/src/main.cpp b/examples/using-crun/src/main.cpp
index 073adb5..7248aa2 100644
--- a/examples/using-crun/src/main.cpp
+++ b/examples/using-crun/src/main.cpp
@@ -9,7 +9,6 @@
 #include <vector>
 
 #include "nlohmann/json.hpp"
-#include "nlohmann/json_fwd.hpp"
 #include "ocppi/cli/CLI.hpp"
 #include "ocppi/cli/crun/Crun.hpp"
 #include "ocppi/runtime/Signal.hpp"
diff --git a/src/ocppi/cli/CommonCLI.cpp b/src/ocppi/cli/CommonCLI.cpp
index ba2995b..4fc4ce9 100644
--- a/src/ocppi/cli/CommonCLI.cpp
+++ b/src/ocppi/cli/CommonCLI.cpp
@@ -9,7 +9,6 @@
 #include <vector>
 
 #include "nlohmann/json.hpp"
-#include "nlohmann/json_fwd.hpp"
 #include "ocppi/cli/CommandFailedError.hpp"
 #include "ocppi/cli/ExecutableNotFoundError.hpp"
 #include "ocppi/cli/Process.hpp"
@@ -34,7 +33,11 @@
 #ifdef OCPPI_WITH_SPDLOG
 #include <memory>
 
+#if __has_include("spdlog/fmt/ranges.h")
 #include "spdlog/fmt/ranges.h" // IWYU pragma: keep
+#else
+#include "spdlog/fmt/bundled/ranges.h" // IWYU pragma: keep
+#endif
 #include "spdlog/sinks/null_sink.h"
 #include "spdlog/spdlog.h"