diff --git a/i3-input/ipc.c b/i3-input/ipc.c
index 597a86ef..2d11f0e0 100644
--- a/i3-input/ipc.c
+++ b/i3-input/ipc.c
@@ -60,7 +60,7 @@ int connect_ipc(char *socket_path) {
         struct sockaddr_un addr;
         memset(&addr, 0, sizeof(struct sockaddr_un));
         addr.sun_family = AF_LOCAL;
-        strcpy(addr.sun_path, socket_path);
+        strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
         if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
                 err(EXIT_FAILURE, "Could not connect to i3");
 
diff --git a/i3-msg/main.c b/i3-msg/main.c
index b22d550e..33bedc7c 100644
--- a/i3-msg/main.c
+++ b/i3-msg/main.c
@@ -175,7 +175,7 @@ int main(int argc, char *argv[]) {
         struct sockaddr_un addr;
         memset(&addr, 0, sizeof(struct sockaddr_un));
         addr.sun_family = AF_LOCAL;
-        strcpy(addr.sun_path, socket_path);
+        strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path) - 1);
         if (connect(sockfd, (const struct sockaddr*)&addr, sizeof(struct sockaddr_un)) < 0)
                 err(EXIT_FAILURE, "Could not connect to i3");
 
diff --git a/src/ipc.c b/src/ipc.c
index 1937d55d..3dd95653 100644
--- a/src/ipc.c
+++ b/src/ipc.c
@@ -91,7 +91,7 @@ static void ipc_send_message(int fd, const unsigned char *payload,
         char msg[buffer_size];
         char *walk = msg;
 
-        strcpy(walk, "i3-ipc");
+        strncpy(walk, "i3-ipc", buffer_size - 1);
         walk += strlen("i3-ipc");
         memcpy(walk, &message_size, sizeof(uint32_t));
         walk += sizeof(uint32_t);