diff --git a/Changes.md b/Changes.md
index 29591851..ac58c430 100644
--- a/Changes.md
+++ b/Changes.md
@@ -1,3 +1,9 @@
+## 1.13.3 - 2026-XX-XX
+
+- Fixed validation of empty maps and arrays at the end of the metadata section.
+  `MMDB_open` would incorrectly reject databases where a 0-element map or array
+  was the last field in metadata. Reported in vimt/MaxMind-DB-Writer-python#16.
+
 ## 1.13.2 - 2026-02-25
 
 - Fixed a compilation failure on macOS 26 (Tahoe) where `sys/endian.h` defines
diff --git a/src/maxminddb.c b/src/maxminddb.c
index 66b69be2..5aa3b254 100644
--- a/src/maxminddb.c
+++ b/src/maxminddb.c
@@ -1729,7 +1729,7 @@ static int get_entry_data_list(const MMDB_s *const mmdb,
             uint32_t array_size = entry_data_list->entry_data.data_size;
             uint32_t array_offset = entry_data_list->entry_data.offset_to_next;
             /* Each array element needs at least 1 byte. */
-            if (array_offset >= mmdb->data_section_size ||
+            if (array_offset > mmdb->data_section_size ||
                 array_size > mmdb->data_section_size - array_offset) {
                 DEBUG_MSG("array size exceeds remaining data section");
                 return MMDB_INVALID_DATA_ERROR;
@@ -1758,7 +1758,7 @@ static int get_entry_data_list(const MMDB_s *const mmdb,
 
             offset = entry_data_list->entry_data.offset_to_next;
             /* Each map entry needs at least a key and a value (1 byte each). */
-            if (offset >= mmdb->data_section_size ||
+            if (offset > mmdb->data_section_size ||
                 size > (mmdb->data_section_size - offset) / 2) {
                 DEBUG_MSG("map size exceeds remaining data section");
                 return MMDB_INVALID_DATA_ERROR;
diff --git a/t/CMakeLists.txt b/t/CMakeLists.txt
index 8ea56c44..5065cca8 100644
--- a/t/CMakeLists.txt
+++ b/t/CMakeLists.txt
@@ -31,6 +31,7 @@ if(UNIX)  # or if (NOT WIN32)
     bad_data_size_t
     bad_epoch_t
     bad_indent_t
+    empty_container_metadata_t
     max_depth_t
     threads_t
   )
diff --git a/t/Makefile.am b/t/Makefile.am
index 8468f868..a85c507d 100644
--- a/t/Makefile.am
+++ b/t/Makefile.am
@@ -19,7 +19,8 @@ check_PROGRAMS = \
 	bad_pointers_t bad_databases_t bad_data_size_t bad_epoch_t bad_indent_t \
 	bad_search_tree_t \
 	basic_lookup_t data_entry_list_t \
-	data-pool-t data_types_t double_close_t dump_t gai_error_t get_value_t \
+	data-pool-t data_types_t double_close_t dump_t empty_container_metadata_t \
+	gai_error_t get_value_t \
 	get_value_pointer_bug_t \
 	ipv4_start_cache_t ipv6_lookup_in_ipv4_t max_depth_t metadata_t \
 	metadata_pointers_t no_map_get_value_t overflow_bounds_t read_node_t \
diff --git a/t/empty_container_metadata_t.c b/t/empty_container_metadata_t.c
new file mode 100644
index 00000000..6ad3dc76
--- /dev/null
+++ b/t/empty_container_metadata_t.c
@@ -0,0 +1,42 @@
+#include "maxminddb_test_helper.h"
+
+static void test_db_opens_and_lookup_succeeds(const char *filename,
+                                              const char *open_msg) {
+    char *db_file = bad_database_path(filename);
+
+    MMDB_s mmdb;
+    int status = MMDB_open(db_file, MMDB_MODE_MMAP, &mmdb);
+    cmp_ok(status, "==", MMDB_SUCCESS, open_msg);
+
+    if (status != MMDB_SUCCESS) {
+        diag("MMDB_open failed: %s", MMDB_strerror(status));
+        free(db_file);
+        return;
+    }
+
+    int gai_error, mmdb_error;
+    MMDB_lookup_string(&mmdb, "1.2.3.4", &gai_error, &mmdb_error);
+    cmp_ok(mmdb_error, "==", MMDB_SUCCESS, "lookup succeeded");
+
+    MMDB_close(&mmdb);
+    free(db_file);
+}
+
+void test_empty_map_last_in_metadata(void) {
+    test_db_opens_and_lookup_succeeds(
+        "libmaxminddb-empty-map-last-in-metadata.mmdb",
+        "opened MMDB with empty map at end of metadata");
+}
+
+void test_empty_array_last_in_metadata(void) {
+    test_db_opens_and_lookup_succeeds(
+        "libmaxminddb-empty-array-last-in-metadata.mmdb",
+        "opened MMDB with empty array at end of metadata");
+}
+
+int main(void) {
+    plan(NO_PLAN);
+    test_empty_map_last_in_metadata();
+    test_empty_array_last_in_metadata();
+    done_testing();
+}
diff --git a/t/maxmind-db b/t/maxmind-db
index 327e23aa..809dd1ca 160000
--- a/t/maxmind-db
+++ b/t/maxmind-db
@@ -1 +1 @@
-Subproject commit 327e23aaccd3873c7d92fd9a6076694c48d877cd
+Subproject commit 809dd1ca37e5c9d3ebc63bf159f81ec332a4f08e