diff --git a/testing/zeek-archiver/umask.test b/testing/zeek-archiver/umask.test
new file mode 100644
index 0000000..4ab173d
--- /dev/null
+++ b/testing/zeek-archiver/umask.test
@@ -0,0 +1,36 @@
+# @TEST-DOC: Check file permissions with different umask settings.
+# @TEST-EXEC: bash %INPUT
+
+. "$SCRIPTS/zeek-archiver-common.sh"
+
+umask 0002
+
+log_in=test__2020-07-16-09-43-10__2020-07-16-09-43-10__.log
+log_out=test.09:43:10-09:43:10.log
+
+echo hello > "$(queue_dir)/${log_in}"
+zeek-archiver -1 -v "$(queue_dir)" "$(archive_dir)"
+
+dir_perms=$(ls -ld $(archive_date_dir) | cut -d ' ' -f 1)
+file_perms=$(ls -l $(archive_date_dir)/${log_out}.gz | cut -d ' ' -f 1)
+
+test "${dir_perms}" == "drwxrwxr-x"  || exit 1
+test "${file_perms}" == "-rw-rw-r--" || exit 1
+
+# @TEST-START-NEXT
+
+. "$SCRIPTS/zeek-archiver-common.sh"
+
+umask 0077
+
+log_in=test__2020-07-16-09-43-10__2020-07-16-09-43-10__.log
+log_out=test.09:43:10-09:43:10.log
+
+echo hello > "$(queue_dir)/${log_in}"
+zeek-archiver -1 -v "$(queue_dir)" "$(archive_dir)"
+
+dir_perms=$(ls -ld $(archive_date_dir) | cut -d ' ' -f 1)
+file_perms=$(ls -l $(archive_date_dir)/${log_out}.gz | cut -d ' ' -f 1)
+
+test "${dir_perms}" == "drwx------" || exit 1
+test "${file_perms}" == "-rw-------"  || exit 1
diff --git a/zeek-archiver/zeek-archiver.cc b/zeek-archiver/zeek-archiver.cc
index 07e8396..af068ec 100644
--- a/zeek-archiver/zeek-archiver.cc
+++ b/zeek-archiver/zeek-archiver.cc
@@ -397,7 +397,7 @@ static void parse_options(int argc, char** argv)
 
 static bool make_dir(const char* dir)
 	{
-	if ( mkdir(dir, 0700) == 0 )
+	if ( mkdir(dir, 0775) == 0 )
 		return true;
 
 	auto mkdir_errno = errno;
@@ -540,7 +540,7 @@ static int run_compress_cmd(const char* src_file, const char* dst_file)
 		if ( src_fd != STDIN_FILENO )
 			close(src_fd);
 
-		int dst_fd = open(dst_file, O_CREAT | O_TRUNC | O_WRONLY, 0644);
+		int dst_fd = open(dst_file, O_CREAT | O_TRUNC | O_WRONLY, 0664);
 
 		if ( dst_fd < 0 )
 			{