diff --git a/Pipfile b/Pipfile
index 3f682ab..0ae5f3d 100644
--- a/Pipfile
+++ b/Pipfile
@@ -9,6 +9,7 @@ coveralls = "*"
 codecov = "*"
 requests-mock = "*"
 pymisp = {editable = true,extras = ["fileobjects", "neo", "openioc", "virustotal", "pdfexport", "docs"],path = "."}
+docutils = "==0.15"
 
 [packages]
 pymisp = {editable = true,extras = ["fileobjects", "openioc", "virustotal", "pdfexport"],path = "."}
diff --git a/Pipfile.lock b/Pipfile.lock
index 447f09f..bf45ecc 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -1,7 +1,7 @@
 {
     "_meta": {
         "hash": {
-            "sha256": "1f3fb04521406827f376b04dcb1287a92ab43ade73b63b18cb5b6ec1d680da35"
+            "sha256": "4b4cf20ef3242efd0c24d7cc54ba2438dee8ba853ab3b9384ad915448ce83048"
         },
         "pipfile-spec": 6,
         "requires": {
@@ -25,11 +25,11 @@
         },
         "beautifulsoup4": {
             "hashes": [
-                "sha256:034740f6cb549b4e932ae1ab975581e6103ac8f942200a0e9759065984391858",
-                "sha256:945065979fb8529dd2f37dbb58f00b661bdbcbebf954f93b32fdf5263ef35348",
-                "sha256:ba6d5c59906a85ac23dadfe5c88deaf3e179ef565f4898671253e50a78680718"
+                "sha256:05668158c7b85b791c5abde53e50265e16f98ad601c402ba44d70f96c4159612",
+                "sha256:25288c9e176f354bf277c0a10aa96c782a6a18a17122dba2e8cec4a97e03343b",
+                "sha256:f040590be10520f2ea4c2ae8c3dae441c7cfff5308ec9d58a0ec0c1b8f81d469"
             ],
-            "version": "==4.7.1"
+            "version": "==4.8.0"
         },
         "certifi": {
             "hashes": [
@@ -260,11 +260,11 @@
         },
         "beautifulsoup4": {
             "hashes": [
-                "sha256:034740f6cb549b4e932ae1ab975581e6103ac8f942200a0e9759065984391858",
-                "sha256:945065979fb8529dd2f37dbb58f00b661bdbcbebf954f93b32fdf5263ef35348",
-                "sha256:ba6d5c59906a85ac23dadfe5c88deaf3e179ef565f4898671253e50a78680718"
+                "sha256:05668158c7b85b791c5abde53e50265e16f98ad601c402ba44d70f96c4159612",
+                "sha256:25288c9e176f354bf277c0a10aa96c782a6a18a17122dba2e8cec4a97e03343b",
+                "sha256:f040590be10520f2ea4c2ae8c3dae441c7cfff5308ec9d58a0ec0c1b8f81d469"
             ],
-            "version": "==4.7.1"
+            "version": "==4.8.0"
         },
         "certifi": {
             "hashes": [
@@ -375,11 +375,11 @@
         },
         "docutils": {
             "hashes": [
-                "sha256:02aec4bd92ab067f6ff27a38a38a41173bf01bed8f89157768c1573f53e474a6",
-                "sha256:51e64ef2ebfb29cae1faa133b3710143496eca21c530f3f71424d77687764274",
-                "sha256:7a4bd47eaf6596e1295ecb11361139febe29b084a87bf005bf899f9a42edc3c6"
+                "sha256:54a349c622ff31c91cbec43b0b512f113b5b24daf00e2ea530bb1bd9aac14849",
+                "sha256:d2ddba74835cb090a1b627d3de4e7835c628d07ee461f7b4480f51af2fe4d448"
             ],
-            "version": "==0.14"
+            "index": "pypi",
+            "version": "==0.15"
         },
         "future": {
             "hashes": [
@@ -563,10 +563,10 @@
         },
         "pyparsing": {
             "hashes": [
-                "sha256:1873c03321fc118f4e9746baf201ff990ceb915f433f23b395f5580d1840cb2a",
-                "sha256:9b6323ef4ab914af344ba97510e966d64ba91055d6b9afa6b30799340e89cc03"
+                "sha256:530d8bf8cc93a34019d08142593cf4d78a05c890da8cf87ffa3120af53772238",
+                "sha256:f78e99616b6f1a4745c0580e170251ef1bbafc0d0513e270c4bd281bf29d2800"
             ],
-            "version": "==2.4.0"
+            "version": "==2.4.1"
         },
         "pyrsistent": {
             "hashes": [