diff --git a/DESCRIPTION b/DESCRIPTION
index f77ce597e30b6bd72d90a0934d1b2e88a221a59f..48710fa494bf254d1e57210128322fa0c590256a 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -44,7 +44,10 @@ Imports:
     plyr,
     SpecsVerification (>= 0.5.0)
 Suggests:
-    easyVerification
+    easyVerification,
+    knitr,
+    rmarkdown
+VignetteBuilder: knitr 
 License: LGPL-3
 URL: https://earth.bsc.es/gitlab/es/s2dverification/wikis/home
 BugReports: https://earth.bsc.es/gitlab/es/s2dverification/issues
diff --git a/vignettes/data_retrieval.md b/vignettes/data_retrieval.md
index 72bcc9e74063fc6f8fead84aeb7a3d68438ab5f9..749bddf408ea1ced152244b64e745922e6639926 100644
--- a/vignettes/data_retrieval.md
+++ b/vignettes/data_retrieval.md
@@ -1,3 +1,8 @@
+---
+output:
+  pdf_document: default
+  html_document: default
+---
 Data retrieval
 ==============
 One of the strong points of s2dverification is its data retrieval module.  
diff --git a/vignettes/example.md b/vignettes/example.md
index d021ea48da2a54174a78b6db87287357ec2e315b..fb521df1c0e2f98244848d0c15ae76351b13770b 100644
--- a/vignettes/example.md
+++ b/vignettes/example.md
@@ -1,3 +1,8 @@
+---
+output:
+  pdf_document: default
+  html_document: default
+---
 Example
 =======
 
diff --git a/vignettes/snippets.md b/vignettes/snippets.md
index 0f742a877d24fa213de1480278e100de291bccf4..f3e0ad2a3aff5a4c39d134bb5b29110f12d4dcff 100644
--- a/vignettes/snippets.md
+++ b/vignettes/snippets.md
@@ -1,3 +1,8 @@
+---
+output:
+  pdf_document: default
+  html_document: default
+---
 Snippets
 ========
 This page contains extended snippets of code used in some sections of the wiki 
diff --git a/vignettes/statistics.md b/vignettes/statistics.md
index f7c4160c38459e807fee4fbe8e3844eb3afcb2b2..608d80f268a6c1bfe54c97c7387da46e48579c2a 100644
--- a/vignettes/statistics.md
+++ b/vignettes/statistics.md
@@ -1,3 +1,8 @@
+---
+output:
+  pdf_document: default
+  html_document: default
+---
 Statistics
 ==========
 The **Statistics** module consists of functions that are commonly used in the 
diff --git a/vignettes/tutorial.md b/vignettes/tutorial.md
index f67127ff700fbcbede6eb15836e14a98aa3c7108..d77a028199eda36d13ed38307ab8b8d776ef1440 100644
--- a/vignettes/tutorial.md
+++ b/vignettes/tutorial.md
@@ -1,3 +1,8 @@
+---
+output:
+  pdf_document: default
+  html_document: default
+---
 Tutorial
 ========
 
diff --git a/vignettes/visualisation.md b/vignettes/visualisation.md
index 2687ecd7a94b1d14823800cdb640d7c25e095095..a61a75ca6841027dba2152b8713c61f43a9d43e8 100644
--- a/vignettes/visualisation.md
+++ b/vignettes/visualisation.md
@@ -1,3 +1,8 @@
+---
+output:
+  pdf_document: default
+  html_document: default
+---
 Visualisation
 =============