diff --git a/.clang-tidy b/.clang-tidy
index 6412a66..dfca83a 100644
--- a/.clang-tidy
+++ b/.clang-tidy
@@ -272,11 +272,14 @@
 readability-braces-around-statements,
 readability-const-return-type,
 readability-container-size-empty,
+readability-convert-member-functions-to-static,
 readability-delete-null-pointer,
 readability-deleted-default,
 readability-else-after-return,
 readability-implicit-bool-conversion,
+readability-make-member-function-const,
 readability-named-parameter,
+readability-non-const-parameter,
 readability-redundant-control-flow,
 readability-redundant-declaration,
 readability-redundant-function-ptr-dereference,
diff --git a/include/multipart_parser.hpp b/include/multipart_parser.hpp
index ee028f1..945ebf9 100644
--- a/include/multipart_parser.hpp
+++ b/include/multipart_parser.hpp
@@ -219,7 +219,7 @@
         }
     }
 
-    char lower(char c) const
+    static char lower(char c)
     {
         return static_cast<char>(c | 0x20);
     }
diff --git a/redfish-core/include/event_service_manager.hpp b/redfish-core/include/event_service_manager.hpp
index 6cb95c4..e6e694f 100644
--- a/redfish-core/include/event_service_manager.hpp
+++ b/redfish-core/include/event_service_manager.hpp
@@ -663,7 +663,7 @@
         }
     }
 
-    void loadOldBehavior()
+    static void loadOldBehavior()
     {
         std::ifstream eventConfigFile(eventServiceFile);
         if (!eventConfigFile.good())
@@ -1312,8 +1312,14 @@
     }
 
 #endif
-    void getReadingsForReport(sdbusplus::message::message& msg)
+    static void getReadingsForReport(sdbusplus::message::message& msg)
     {
+        if (msg.is_method_error())
+        {
+            BMCWEB_LOG_ERROR << "TelemetryMonitor Signal error";
+            return;
+        }
+
         sdbusplus::message::object_path path(msg.get_path());
         std::string id = path.filename();
         if (id.empty())
@@ -1380,16 +1386,7 @@
                                "arg0=xyz.openbmc_project.Telemetry.Report";
 
         matchTelemetryMonitor = std::make_shared<sdbusplus::bus::match::match>(
-            *crow::connections::systemBus, matchStr,
-            [this](sdbusplus::message::message& msg) {
-                if (msg.is_method_error())
-                {
-                    BMCWEB_LOG_ERROR << "TelemetryMonitor Signal error";
-                    return;
-                }
-
-                getReadingsForReport(msg);
-            });
+            *crow::connections::systemBus, matchStr, getReadingsForReport);
     }
 };
 
diff --git a/redfish-core/include/gzfile.hpp b/redfish-core/include/gzfile.hpp
index 567741d..696b13c 100644
--- a/redfish-core/include/gzfile.hpp
+++ b/redfish-core/include/gzfile.hpp
@@ -38,7 +38,7 @@
     std::string lastDelimiter;
     size_t totalFilesSize = 0;
 
-    void printErrorMessage(gzFile logStream)
+    static void printErrorMessage(gzFile logStream)
     {
         int errNum = 0;
         const char* errMsg = gzerror(logStream, &errNum);
diff --git a/redfish-core/lib/task.hpp b/redfish-core/lib/task.hpp
index b7795a7..4ebbc14 100644
--- a/redfish-core/lib/task.hpp
+++ b/redfish-core/lib/task.hpp
@@ -188,7 +188,7 @@
             });
     }
 
-    void sendTaskEvent(const std::string_view state, size_t index)
+    static void sendTaskEvent(const std::string_view state, size_t index)
     {
         std::string origin =
             "/redfish/v1/TaskService/Tasks/" + std::to_string(index);