diff --git a/ChangeLog.txt b/ChangeLog.txt
index abc2dc8fb3..c546db24ed 100644
--- a/ChangeLog.txt
+++ b/ChangeLog.txt
@@ -3,6 +3,8 @@ Broker:
   messages. Closes #1968.
 - mosquitto_connect_bind_async() and mosquitto_connect_bind_v5() should not
   reset the bind address option if called with bind_address == NULL.
+- Fix dynamic security configuration possibly not being reloaded on Windows
+  only. Closes #1962.
 
 Build:
 - Fix man pages not being built when using CMake. Closes #1969.
diff --git a/plugins/dynamic-security/plugin.c b/plugins/dynamic-security/plugin.c
index c41e498c97..a8280b0136 100644
--- a/plugins/dynamic-security/plugin.c
+++ b/plugins/dynamic-security/plugin.c
@@ -346,8 +346,8 @@ static int dynsec__config_load(void)
 	char *json_str;
 	cJSON *tree;
 
-	/* Save to file */
-	fptr = fopen(config_file, "rt");
+	/* Load from file */
+	fptr = fopen(config_file, "rb");
 	if(fptr == NULL){
 		return 1;
 	}