diff --git a/.travis.yml b/.travis.yml
index 96744ae..c413fe7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,17 +1,16 @@
-language: bash
+language: python
+
+cache: pip
+
+python:
+    - "3.6"
 
 sudo: required
 
-dist: trusty
-
 install:
-    - git clone https://github.com/stedolan/jq.git
-    - pushd jq
-    - autoreconf -i
-    - ./configure --disable-maintainer-mode
-    - make
-    - sudo make install
-    - popd
+    - sudo apt-get update -qq
+    - sudo apt-get install -y -qq jq moreutils
+    - pip install jsonschema
 
 script:
-    - cat */*.json | jq .
+    - ./validate_all.sh
diff --git a/galaxies/exploit-kit.json b/galaxies/exploit-kit.json
index f86ddf1..4707448 100644
--- a/galaxies/exploit-kit.json
+++ b/galaxies/exploit-kit.json
@@ -1,7 +1,7 @@
 {
-   "type" : "exploit-kit",
-   "name" : "Exploit-Kit",
-   "description":"Exploit-Kit is an enumeration of some exploitation kits used by adversaries. The list includes document, browser and router exploit kits.It's not meant to be totally exhaustive but aim at covering the most seen in the past 5 years",
-   "version": 2,
-   "uuid": "6ab240ec-bd79-11e6-a4a6-cec0c932ce01"
+  "type": "exploit-kit",
+  "name": "Exploit-Kit",
+  "description": "Exploit-Kit is an enumeration of some exploitation kits used by adversaries. The list includes document, browser and router exploit kits.It's not meant to be totally exhaustive but aim at covering the most seen in the past 5 years",
+  "version": 2,
+  "uuid": "6ab240ec-bd79-11e6-a4a6-cec0c932ce01"
 }
diff --git a/galaxies/microsoft-activity-group.json b/galaxies/microsoft-activity-group.json
index 6ddcfb0..9bfa2a3 100644
--- a/galaxies/microsoft-activity-group.json
+++ b/galaxies/microsoft-activity-group.json
@@ -1,7 +1,7 @@
 {
-   "name": "Microsoft Activity Group actor",
-   "type": "microsoft-activity-group",
-   "description": "Activity groups as described by Microsoft",
-   "version": 1,
-   "uuid": "74c869e8-0b8e-4e5f-96e6-cd992e07a505"
+  "name": "Microsoft Activity Group actor",
+  "type": "microsoft-activity-group",
+  "description": "Activity groups as described by Microsoft",
+  "version": 1,
+  "uuid": "74c869e8-0b8e-4e5f-96e6-cd992e07a505"
 }
diff --git a/galaxies/preventive-measure.json b/galaxies/preventive-measure.json
index 9046977..40b5d91 100644
--- a/galaxies/preventive-measure.json
+++ b/galaxies/preventive-measure.json
@@ -1,7 +1,7 @@
 {
-   "name": "Preventive Measure",
-   "type": "preventive-measure",
-   "description": "Preventive measures based on the ransomware document overview as published in https://docs.google.com/spreadsheets/d/1TWS238xacAto-fLKh1n5uTsdijWdCEsGIM0Y0Hvmc5g/pubhtml# . The preventive measures are quite generic and can fit any standard Windows infrastructure and their security measures.",
-   "version": 1,
-   "uuid": "8168995b-adcd-4684-9e37-206c5771505a"
+  "name": "Preventive Measure",
+  "type": "preventive-measure",
+  "description": "Preventive measures based on the ransomware document overview as published in https://docs.google.com/spreadsheets/d/1TWS238xacAto-fLKh1n5uTsdijWdCEsGIM0Y0Hvmc5g/pubhtml# . The preventive measures are quite generic and can fit any standard Windows infrastructure and their security measures.",
+  "version": 1,
+  "uuid": "8168995b-adcd-4684-9e37-206c5771505a"
 }
diff --git a/galaxies/tds.json b/galaxies/tds.json
index 2763cf0..e773d3a 100644
--- a/galaxies/tds.json
+++ b/galaxies/tds.json
@@ -1,7 +1,7 @@
 {
-   "type" : "tds",
-   "name" : "TDS",
-   "description": "TDS is a list of Traffic Direction System used by adversaries",
-   "version": 2,
-   "uuid": "1b9a7d8e-bd7a-11e6-a4a6-cec0c932ce01"
+  "type": "tds",
+  "name": "TDS",
+  "description": "TDS is a list of Traffic Direction System used by adversaries",
+  "version": 2,
+  "uuid": "1b9a7d8e-bd7a-11e6-a4a6-cec0c932ce01"
 }
diff --git a/galaxies/threat-actor.json b/galaxies/threat-actor.json
index 9b1a57b..d5f64ec 100644
--- a/galaxies/threat-actor.json
+++ b/galaxies/threat-actor.json
@@ -1,7 +1,7 @@
 {
-   "name" : "Threat Actor",
-   "type" : "threat-actor",
-   "description": "Threat actors are characteristics of malicious actors (or adversaries) representing a cyber attack threat including presumed intent and historically observed behaviour.",
-   "version": 1,
-   "uuid": "698774c7-8022-42c4-917f-8d6e4f06ada3"
+  "name": "Threat Actor",
+  "type": "threat-actor",
+  "description": "Threat actors are characteristics of malicious actors (or adversaries) representing a cyber attack threat including presumed intent and historically observed behaviour.",
+  "version": 1,
+  "uuid": "698774c7-8022-42c4-917f-8d6e4f06ada3"
 }
diff --git a/galaxies/tool.json b/galaxies/tool.json
index 2237162..b4adbfd 100644
--- a/galaxies/tool.json
+++ b/galaxies/tool.json
@@ -1,7 +1,7 @@
 {
-   "type" : "tool",
-   "name" : "Tool",
-   "description": "Threat actors tools is an enumeration of tools used by adversaries. The list includes malware but also common software regularly used by the adversaries.",
-   "version": 1,
-   "uuid": "9b8037f7-bc8f-4de1-a797-37266619bc0b"
+  "type": "tool",
+  "name": "Tool",
+  "description": "Threat actors tools is an enumeration of tools used by adversaries. The list includes malware but also common software regularly used by the adversaries.",
+  "version": 1,
+  "uuid": "9b8037f7-bc8f-4de1-a797-37266619bc0b"
 }
diff --git a/jq_all_the_things.sh b/jq_all_the_things.sh
new file mode 100755
index 0000000..e87dd4c
--- /dev/null
+++ b/jq_all_the_things.sh
@@ -0,0 +1,13 @@
+#!/bin/bash
+
+set -e
+set -x
+
+# Seeds sponge, from moreutils
+
+for dir in galaxies/*.json
+do
+    cat ${dir} | jq . | sponge ${dir}
+done
+
+cat schema.json | jq . | sponge schema.json
diff --git a/schema.json b/schema.json
new file mode 100644
index 0000000..73acaba
--- /dev/null
+++ b/schema.json
@@ -0,0 +1,72 @@
+{
+  "$schema": "http://json-schema.org/schema#",
+  "title": "Validator for misp-galaxies",
+  "id": "https://www.github.com/MISP/misp-galaxies/schema.json",
+  "type": "object",
+  "additionalProperties": false,
+  "properties": {
+    "description": {
+      "type": "string"
+    },
+    "type": {
+      "type": "string"
+    },
+    "version": {
+      "type": "integer"
+    },
+    "name": {
+      "type": "string"
+    },
+    "uuid": {
+      "type": "string"
+    },
+    "source": {
+      "type": "string"
+    },
+    "values": {
+      "type": "array",
+      "uniqueItems": true,
+      "items": {
+        "type": "object",
+        "additionalProperties": false,
+        "properties": {
+          "description": {
+            "type": "string"
+          },
+          "value": {
+            "type": "string"
+          },
+          "type": {
+            "type": "string"
+          },
+          "Possible Issues": {
+            "type": "string"
+          },
+          "meta": {
+            "type": "object"
+          }
+        },
+        "required": [
+          "value"
+        ]
+      }
+    },
+    "authors": {
+      "type": "array",
+      "uniqueItems": true,
+      "items": {
+        "type": "string"
+      }
+    }
+  },
+  "required": [
+    "description",
+    "type",
+    "version",
+    "name",
+    "uuid",
+    "values",
+    "authors",
+    "source"
+  ]
+}
diff --git a/validate_all.sh b/validate_all.sh
new file mode 100755
index 0000000..f39f850
--- /dev/null
+++ b/validate_all.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+set -e
+set -x
+
+./jq_all_the_things.sh
+
+diffs=`git status --porcelain | wc -l`
+
+if ! [ $diffs -eq 0 ]; then
+	echo "Please make sure you run ./jq_all_the_things.sh before commiting."
+	exit 1
+fi
+
+for dir in galaxies/*.json
+do
+  echo -n "${dir}: "
+  jsonschema -i ${dir} schema.json
+  echo ''
+done
+