diff --git a/src/HowBadIsMyBatch.ipynb b/src/HowBadIsMyBatch.ipynb
index 7b9e84c10f1..ffb29cfc145 100644
--- a/src/HowBadIsMyBatch.ipynb
+++ b/src/HowBadIsMyBatch.ipynb
@@ -28,26 +28,32 @@
     "\n",
     "class DateProvider:\n",
     "    \n",
+    "    def __init__(self):\n",
+    "        self.lastUpdated = None\n",
+    "        self.lastUpdatedDataSource = None\n",
+    "\n",
     "    def needsUpdate(self):\n",
-    "        lastUpdated = self._getLastUpdated()\n",
-    "        print('          lastUpdated:', lastUpdated)\n",
-    "\n",
-    "        lastUpdatedDataSource = self._getLastUpdatedDataSource()\n",
-    "        print('lastUpdatedDataSource:', lastUpdatedDataSource)\n",
-    "\n",
-    "        return lastUpdated < lastUpdatedDataSource\n",
+    "        return self.getLastUpdated() < self.getLastUpdatedDataSource()\n",
     "        \n",
-    "    def _getLastUpdated(self):\n",
-    "        return self.__getLastUpdated(\n",
-    "            url = \"https://knollfrank.github.io/HowBadIsMyBatch/batchCodeTable.html\",\n",
-    "            getDateStr = lambda soup: soup.find(id = \"last_updated\").text)\n",
+    "    def getLastUpdated(self):\n",
+    "        if self.lastUpdated is None:\n",
+    "            self.lastUpdated = self.__getLastUpdated(\n",
+    "                url = \"https://knollfrank.github.io/HowBadIsMyBatch/batchCodeTable.html\",\n",
+    "                getDateStr = lambda soup: soup.find(id = \"last_updated\").text)\n",
+    "        \n",
+    "        return self.lastUpdated\n",
     "\n",
-    "    def _getLastUpdatedDataSource(self):\n",
-    "        def getDateStr(soup):\n",
-    "            lastUpdated = soup.find(string = re.compile(\"Last updated\"))\n",
-    "            return re.search('Last updated: (.+).', lastUpdated).group(1)\n",
+    "    def getLastUpdatedDataSource(self):\n",
+    "        if self.lastUpdatedDataSource is None:\n",
+    "            def getDateStr(soup):\n",
+    "                lastUpdated = soup.find(string = re.compile(\"Last updated\"))\n",
+    "                return re.search('Last updated: (.+).', lastUpdated).group(1)\n",
     "\n",
-    "        return self.__getLastUpdated(url = \"https://vaers.hhs.gov/data/datasets.html\", getDateStr = getDateStr)\n",
+    "            self.lastUpdatedDataSource = self.__getLastUpdated(\n",
+    "                url = \"https://vaers.hhs.gov/data/datasets.html\",\n",
+    "                getDateStr = getDateStr)\n",
+    "\n",
+    "        return self.lastUpdatedDataSource\n",
     "\n",
     "    def __getLastUpdated(self, url, getDateStr):\n",
     "        htmlContent = requests.get(url).text\n",
@@ -64,7 +70,10 @@
    "outputs": [],
    "source": [
     "dateProvider = DateProvider()\n",
-    "print('needsUpdate:', dateProvider.needsUpdate())"
+    "print('          lastUpdated:', dateProvider.getLastUpdated())\n",
+    "print('lastUpdatedDataSource:', dateProvider.getLastUpdatedDataSource())        \n",
+    "needsUpdate = dateProvider.needsUpdate()\n",
+    "print('needsUpdate:', needsUpdate)"
    ]
   },
   {
diff --git a/src/intensivstationen/Intensivstationen.ipynb b/src/intensivstationen/Intensivstationen.ipynb
index 76c9933125d..b629eace8eb 100644
--- a/src/intensivstationen/Intensivstationen.ipynb
+++ b/src/intensivstationen/Intensivstationen.ipynb
@@ -118,7 +118,7 @@
     "print('          lastUpdated:', dateProvider.getLastUpdated())\n",
     "print('lastUpdatedDataSource:', dateProvider.getLastUpdatedDataSource())        \n",
     "needsUpdate = dateProvider.needsUpdate()\n",
-    "print('needsUpdate: ', needsUpdate)"
+    "print('needsUpdate:', needsUpdate)"
    ]
   },
   {