diff --git a/Doxyfile b/Doxyfile
index c0ed9fd4..9344f8ac 100644
--- a/Doxyfile
+++ b/Doxyfile
@@ -1,6 +1,6 @@
 DOXYFILE_ENCODING      = UTF-8
 PROJECT_NAME           = "tangle-accelerator"
-PROJECT_NUMBER         = 0.9.5
+PROJECT_NUMBER         = 0.9.6
 OUTPUT_DIRECTORY       = docs/
 OPTIMIZE_OUTPUT_FOR_C  = YES
 INPUT                  = . \
diff --git a/accelerator/config.h b/accelerator/config.h
index 1eb5fb40..43085555 100644
--- a/accelerator/config.h
+++ b/accelerator/config.h
@@ -37,7 +37,7 @@ extern "C" {
 
 /** @name tangle-accelerator configures */
 /** @{ */
-#define TA_VERSION "tangle-accelerator/0.9.5"
+#define TA_VERSION "tangle-accelerator/0.9.6"
 #define TA_HOST "localhost"
 #define TA_PORT 8000
 #define SEED                                                                   \
diff --git a/connectivity/http/http.c b/connectivity/http/http.c
index 1c4a9268..c374ccfa 100644
--- a/connectivity/http/http.c
+++ b/connectivity/http/http.c
@@ -289,7 +289,7 @@ static int ta_http_header_iter(void *cls, enum MHD_ValueKind kind, const char *k
   ta_http_request_t *header = cls;
 
   if (0 == strncasecmp(MHD_HTTP_HEADER_CONTENT_TYPE, key, strlen(MHD_HTTP_HEADER_CONTENT_TYPE))) {
-    if (api_path_matcher(value, "application/json(;?\\s*charset=(UTF|utf)-8)?") == SC_OK) {
+    if (api_path_matcher(value, "application/json\\s*(;?\\s*charset\\s*=\\s*(UTF|utf)-8)?") == SC_OK) {
       header->valid_content_type = true;
     } else {
       header->valid_content_type = false;