diff --git a/include/jbus/Endpoint.hpp b/include/jbus/Endpoint.hpp
index bda3d96..f614a57 100644
--- a/include/jbus/Endpoint.hpp
+++ b/include/jbus/Endpoint.hpp
@@ -91,7 +91,7 @@ class Endpoint {
       return x34_bytesSent * 100 / x64_totalBytes;
     }
     bool isDone() const { return !x14_callback; }
-    operator bool() const { return m_initialized; }
+    explicit operator bool() const { return m_initialized; }
   };
 
   friend class ThreadLocalEndpoint;
diff --git a/include/jbus/Listener.hpp b/include/jbus/Listener.hpp
index bbdee65..74efba1 100644
--- a/include/jbus/Listener.hpp
+++ b/include/jbus/Listener.hpp
@@ -10,8 +10,8 @@ namespace jbus {
 
 /** Server interface for accepting incoming connections from GBA emulator instances. */
 class Listener {
-  net::Socket m_dataServer = {false};
-  net::Socket m_clockServer = {false};
+  net::Socket m_dataServer{false};
+  net::Socket m_clockServer{false};
   std::thread m_listenerThread;
   std::mutex m_queueLock;
   std::queue<std::unique_ptr<Endpoint>> m_endpointQueue;
diff --git a/include/jbus/Socket.hpp b/include/jbus/Socket.hpp
index 86df640..e349d6d 100644
--- a/include/jbus/Socket.hpp
+++ b/include/jbus/Socket.hpp
@@ -24,10 +24,10 @@ class IPAddress {
   void resolve(const std::string& address);
 
 public:
-  IPAddress(const std::string& address) { resolve(address); }
+  explicit IPAddress(const std::string& address) { resolve(address); }
 
   uint32_t toInteger() const;
-  operator bool() const { return m_valid; }
+  explicit operator bool() const { return m_valid; }
 };
 
 /** Server-oriented TCP socket class derived from SFML */
@@ -50,7 +50,7 @@ public:
   static EResult LastWSAError();
 #endif
 
-  Socket(bool blocking) : m_isBlocking(blocking) {}
+  explicit Socket(bool blocking) : m_isBlocking(blocking) {}
   ~Socket() { close(); }
 
   Socket(const Socket& other) = delete;
@@ -76,7 +76,7 @@ public:
   EResult recv(void* buf, size_t len, size_t& transferred);
   EResult recv(void* buf, size_t len);
 
-  operator bool() const { return isOpen(); }
+  explicit operator bool() const { return isOpen(); }
 
   SocketTp GetInternalSocket() const { return m_socket; }
 };
diff --git a/lib/Listener.cpp b/lib/Listener.cpp
index 49c3adb..d2c9562 100644
--- a/lib/Listener.cpp
+++ b/lib/Listener.cpp
@@ -43,8 +43,8 @@ void Listener::listenerProc() {
   }
 
   /* We use blocking I/O since we have a dedicated transfer thread */
-  net::Socket acceptData = {true};
-  net::Socket acceptClock = {true};
+  net::Socket acceptData{true};
+  net::Socket acceptClock{true};
   std::string hostname;
   while (m_running) {
     if (m_dataServer.accept(acceptData, hostname) == net::Socket::EResult::OK) {