diff --git a/tap.c b/tap.c
index a3ba958..14d9b3d 100644
--- a/tap.c
+++ b/tap.c
@@ -1136,7 +1136,7 @@ void tap_handler_pasta(struct ctx *c, uint32_t events,
  */
 int tap_sock_unix_open(char *sock_path)
 {
-	int fd = socket(AF_UNIX, SOCK_STREAM, 0);
+	int fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
 	struct sockaddr_un addr = {
 		.sun_family = AF_UNIX,
 	};
@@ -1155,7 +1155,8 @@ int tap_sock_unix_open(char *sock_path)
 					UNIX_SOCK_PATH, i))
 			die_perror("Can't build UNIX domain socket path");
 
-		ex = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK, 0);
+		ex = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC,
+			    0);
 		if (ex < 0)
 			die_perror("Failed to check for UNIX domain conflicts");
 
diff --git a/tcp.c b/tcp.c
index a3d48fa..6a98dfa 100644
--- a/tcp.c
+++ b/tcp.c
@@ -1410,7 +1410,7 @@ static int tcp_conn_new_sock(const struct ctx *c, sa_family_t af)
 {
 	int s;
 
-	s = socket(af, SOCK_STREAM | SOCK_NONBLOCK, IPPROTO_TCP);
+	s = socket(af, SOCK_STREAM | SOCK_NONBLOCK | SOCK_CLOEXEC, IPPROTO_TCP);
 
 	if (s > FD_REF_MAX) {
 		close(s);
diff --git a/util.c b/util.c
index dddef93..3448f30 100644
--- a/util.c
+++ b/util.c
@@ -183,7 +183,8 @@ void sock_probe_mem(struct ctx *c)
 	int v = INT_MAX / 2, s;
 	socklen_t sl;
 
-	if ((s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) {
+	s = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);
+	if (s < 0) {
 		c->low_wmem = c->low_rmem = 1;
 		return;
 	}