diff --git a/configure.ac b/configure.ac
index 881f1a2..7b9d0f7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ(2.60)
-AC_INIT(mod_dims, 3.3.28, [jeremy.collins@beetlebug.org])
+AC_INIT(mod_dims, 3.3.29, [jeremy.collins@beetlebug.org])
 AM_INIT_AUTOMAKE([no-define])
 AC_CONFIG_SRCDIR([src/mod_dims.c])
 
diff --git a/docker/dims.conf b/docker/dims.conf
index 8ab7820..7189891 100644
--- a/docker/dims.conf
+++ b/docker/dims.conf
@@ -11,6 +11,7 @@ DimsAddClient ${DIMS_CLIENT} ${DIMS_NO_IMAGE_URL} ${DIMS_CACHE_CONTROL_MAX_AGE}
 DimsDefaultImageURL ${DIMS_DEFAULT_IMAGE_URL}
 DimsCacheExpire ${DIMS_CACHE_EXPIRE}
 DimsNoImageCacheExpire ${DIMS_NO_IMAGE_CACHE_EXPIRE}
+DimsUserAgentEnabled true
 
 ## Handler definitions. ##
 
diff --git a/src/mod_dims.c b/src/mod_dims.c
index 7017057..3a567fe 100755
--- a/src/mod_dims.c
+++ b/src/mod_dims.c
@@ -34,7 +34,7 @@
  */
 
 #define MODULE_RELEASE "$Revision: $"
-#define MODULE_VERSION "3.3.28"
+#define MODULE_VERSION "3.3.29"
 
 #include "mod_dims.h"
 #include "util_md5.h"
@@ -265,6 +265,30 @@ dims_config_set_default_output_format(cmd_parms *cmd, void *dummy, const char *a
     return NULL;
 }
 
+static const char *
+dims_config_set_user_agent_override(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    dims_config_rec *config = (dims_config_rec *) ap_get_module_config(
+            cmd->server->module_config, &dims_module);
+    char *user_agent = (char *) arg;
+    config->user_agent_override = user_agent;
+    return NULL;
+}
+
+static const char *
+dims_config_set_user_agent_enabled(cmd_parms *cmd, void *dummy, const char *arg)
+{
+    dims_config_rec *config = (dims_config_rec *) ap_get_module_config(
+            cmd->server->module_config, &dims_module);
+    if(strcmp(arg, "true") == 0) {
+        config->user_agent_enabled = 1;
+    }
+    else {
+        config->user_agent_enabled = 0;
+    }
+    return NULL;
+}
+
 static const char *
 dims_config_set_client(cmd_parms *cmd, void *d, int argc, char *const argv[])
 {
@@ -550,6 +574,23 @@ char *url_encode(char *str) {
     return buf;
 }
 
+static int
+dims_curl_debug_cb(CURL *handle,
+    curl_infotype type,
+    char *data,
+    size_t size,
+    void *clientp)
+{
+    dims_request_rec *d = (dims_request_rec *) clientp;
+    switch(type) {
+        case CURLINFO_HEADER_OUT:
+            ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, d->r, "Curl request header data: %s ", data);
+            break;
+        default:
+            break;
+    }
+}
+
 CURLcode
 dims_get_image_data(dims_request_rec *d, char *fetch_url, dims_image_data_t *data)
 {
@@ -587,6 +628,17 @@ dims_get_image_data(dims_request_rec *d, char *fetch_url, dims_image_data_t *dat
     curl_easy_setopt(curl_handle, CURLOPT_TIMEOUT_MS, d->config->download_timeout + extra_time);
     curl_easy_setopt(curl_handle, CURLOPT_NOSIGNAL, 1);
     curl_easy_setopt(curl_handle, CURLOPT_FOLLOWLOCATION, 1);
+    curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L);
+    curl_easy_setopt(curl_handle, CURLOPT_DEBUGFUNCTION, dims_curl_debug_cb);
+    curl_easy_setopt(curl_handle, CURLOPT_DEBUGDATA, d);
+
+    /* Set the user agent to dims/<version> */
+    if (d->config->user_agent_override != NULL && d->config->user_agent_enabled == 1) {
+        curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, d->config->user_agent_override);
+    } else if (d->config->user_agent_enabled == 1) {
+        char *dims_useragent = apr_psprintf(d->r->pool, "mod_dims/%s", MODULE_VERSION);
+        curl_easy_setopt(curl_handle, CURLOPT_USERAGENT, dims_useragent);
+    }
 
     /* The curl shared handle allows this process to share DNS cache
      * and prevents the DNS cache from going away after every request.
@@ -2118,6 +2170,14 @@ static const command_rec dims_commands[] =
     AP_INIT_TAKE1("DimsDefaultOutputFormat",
                 dims_config_set_default_output_format, NULL, RSRC_CONF,
                 "Default output format if 'format' command is not present in the request."),
+    AP_INIT_TAKE1("DimsUserAgentEnabled",
+                dims_config_set_user_agent_enabled, NULL, RSRC_CONF,
+                "Enable DIMS User-Agent header ('dims/<version>'), true OR false."
+                "The default is false."),
+    AP_INIT_TAKE1("DimsUserAgentOverride",
+                dims_config_set_user_agent_override, NULL, RSRC_CONF,
+                "Override DIMS User-Agent header"
+                "The default is 'dims/<version>."),
     {NULL}
 };
 
diff --git a/src/mod_dims.h b/src/mod_dims.h
index cb9a513..233df70 100644
--- a/src/mod_dims.h
+++ b/src/mod_dims.h
@@ -117,6 +117,9 @@ struct dims_config_rec {
     long max_expiry_period;
     char *cache_dir;
     char *default_image_prefix;
+
+    char *user_agent_override;
+    int user_agent_enabled;
 };
 
 struct dims_client_config_rec {