diff --git a/src/gmnlm.c b/src/gmnlm.c
index 59755a4..27a57dd 100644
--- a/src/gmnlm.c
+++ b/src/gmnlm.c
@@ -338,7 +338,7 @@ pipe_resp(FILE *out, struct gemini_response resp, char *cmd) {
 		close(pfd[1]);
 		dup2(pfd[0], STDIN_FILENO);
 		close(pfd[0]);
-		execlp("sh", "sh", "-c", cmd);
+		execlp("sh", "sh", "-c", cmd, NULL);
 		perror("exec");
 		_exit(1);
 	}
diff --git a/src/tofu.c b/src/tofu.c
index b9100c7..ba54933 100644
--- a/src/tofu.c
+++ b/src/tofu.c
@@ -124,8 +124,8 @@ callback:
 		struct tm expires_tm;
 		ASN1_TIME_to_tm(notAfter, &expires_tm);
 		time_t expires = mktime(&expires_tm);
-		fprintf(f, "%s %s %s %ld\n", servername,
-			"SHA-512", fingerprint, expires);
+		fprintf(f, "%s %s %s %jd\n", servername,
+			"SHA-512", fingerprint, (intmax_t)expires);
 		fclose(f);
 
 		host = calloc(1, sizeof(struct known_host));