diff --git a/redfish-core/include/event_service_manager.hpp b/redfish-core/include/event_service_manager.hpp
index 3c47698..1785828 100644
--- a/redfish-core/include/event_service_manager.hpp
+++ b/redfish-core/include/event_service_manager.hpp
@@ -374,7 +374,8 @@
         // Subscription constructor
     }
 
-    Subscription(const std::shared_ptr<boost::beast::tcp_stream>& adaptor) :
+    explicit Subscription(
+        const std::shared_ptr<boost::beast::tcp_stream>& adaptor) :
         eventSeqNum(1)
     {
         sseConn = std::make_shared<crow::ServerSentEvents>(adaptor);
diff --git a/redfish-core/include/privileges.hpp b/redfish-core/include/privileges.hpp
index 160816f..f20cede 100644
--- a/redfish-core/include/privileges.hpp
+++ b/redfish-core/include/privileges.hpp
@@ -198,7 +198,8 @@
     }
 
   private:
-    Privileges(const std::bitset<maxPrivilegeCount>& p) : privilegeBitset{p}
+    explicit Privileges(const std::bitset<maxPrivilegeCount>& p) :
+        privilegeBitset{p}
     {}
     std::bitset<maxPrivilegeCount> privilegeBitset = 0;
 };
diff --git a/redfish-core/include/redfish.hpp b/redfish-core/include/redfish.hpp
index c961b2d..8c05dd7 100644
--- a/redfish-core/include/redfish.hpp
+++ b/redfish-core/include/redfish.hpp
@@ -62,7 +62,7 @@
      *
      * @param[in] app   Crow app on which Redfish will initialize
      */
-    RedfishService(App& app)
+    explicit RedfishService(App& app)
     {
         requestAccountServiceRoutes(app);
         requestRoutesRoles(app);
diff --git a/redfish-core/include/server_sent_events.hpp b/redfish-core/include/server_sent_events.hpp
index 6663f66..16d8e18 100644
--- a/redfish-core/include/server_sent_events.hpp
+++ b/redfish-core/include/server_sent_events.hpp
@@ -256,7 +256,8 @@
     ServerSentEvents(ServerSentEvents&&) = delete;
     ServerSentEvents& operator=(ServerSentEvents&&) = delete;
 
-    ServerSentEvents(const std::shared_ptr<boost::beast::tcp_stream>& adaptor) :
+    explicit ServerSentEvents(
+        const std::shared_ptr<boost::beast::tcp_stream>& adaptor) :
         sseConn(adaptor)
     {
         startSSE();
diff --git a/redfish-core/lib/certificate_service.hpp b/redfish-core/lib/certificate_service.hpp
index b931c7d..2fc606d 100644
--- a/redfish-core/lib/certificate_service.hpp
+++ b/redfish-core/lib/certificate_service.hpp
@@ -155,7 +155,7 @@
     CertificateFile& operator=(const CertificateFile&) = delete;
     CertificateFile(CertificateFile&&) = delete;
     CertificateFile& operator=(CertificateFile&&) = delete;
-    CertificateFile(const std::string& certString)
+    explicit CertificateFile(const std::string& certString)
     {
         std::array<char, 18> dirTemplate = {'/', 't', 'm', 'p', '/', 'C',
                                             'e', 'r', 't', 's', '.', 'X',
diff --git a/redfish-core/lib/health.hpp b/redfish-core/lib/health.hpp
index 04281bf..cf84c93 100644
--- a/redfish-core/lib/health.hpp
+++ b/redfish-core/lib/health.hpp
@@ -31,8 +31,10 @@
 struct HealthPopulate : std::enable_shared_from_this<HealthPopulate>
 {
     // By default populate status to "/Status" of |asyncResp->res.jsonValue|.
-    HealthPopulate(const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn) :
-        asyncResp(asyncRespIn), statusPtr("/Status")
+    explicit HealthPopulate(
+        const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn) :
+        asyncResp(asyncRespIn),
+        statusPtr("/Status")
     {}
 
     // Takes a JSON pointer rather than a reference. This is pretty useful when
diff --git a/redfish-core/lib/managers.hpp b/redfish-core/lib/managers.hpp
index f15fb0b..bda5a1a 100644
--- a/redfish-core/lib/managers.hpp
+++ b/redfish-core/lib/managers.hpp
@@ -1168,7 +1168,8 @@
 struct GetPIDValues : std::enable_shared_from_this<GetPIDValues>
 {
 
-    GetPIDValues(const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn) :
+    explicit GetPIDValues(
+        const std::shared_ptr<bmcweb::AsyncResp>& asyncRespIn) :
         asyncResp(asyncRespIn)
 
     {}
diff --git a/redfish-core/lib/sensors.hpp b/redfish-core/lib/sensors.hpp
index ca842d9..8b97b7c 100644
--- a/redfish-core/lib/sensors.hpp
+++ b/redfish-core/lib/sensors.hpp
@@ -307,7 +307,7 @@
 class InventoryItem
 {
   public:
-    InventoryItem(const std::string& objPath) : objectPath(objPath)
+    explicit InventoryItem(const std::string& objPath) : objectPath(objPath)
     {
         // Set inventory item name to last node of object path
         sdbusplus::message::object_path path(objectPath);
diff --git a/redfish-core/lib/task.hpp b/redfish-core/lib/task.hpp
index b1b1d22..dcad059 100644
--- a/redfish-core/lib/task.hpp
+++ b/redfish-core/lib/task.hpp
@@ -39,7 +39,7 @@
 
 struct Payload
 {
-    Payload(const crow::Request& req) :
+    explicit Payload(const crow::Request& req) :
         targetUri(req.url), httpOperation(req.methodString()),
         httpHeaders(nlohmann::json::array())