diff --git a/notebooks/rarelink_cdm_phenopacket_mapper.ipynb b/notebooks/rarelink_cdm_phenopacket_mapper.ipynb
index 36e6bc8a..83ace7e3 100644
--- a/notebooks/rarelink_cdm_phenopacket_mapper.ipynb
+++ b/notebooks/rarelink_cdm_phenopacket_mapper.ipynb
@@ -107,7 +107,13 @@
     "    name='HL7 FHIR', \n",
     "    namespace_prefix='hl7fhir', \n",
     "    url='https://www.hl7.org/fhir/'\n",
-    ")\n"
+    ")\n",
+    "\n",
+    "GA4GH = CodeSystem(\n",
+    "    name='Global Alliance for Genomics and Health - Phenopacket Schema', \n",
+    "    namespace_prefix='ga4gh', \n",
+    "    url='https://www.ga4gh.org/'\n",
+    ")"
    ]
   },
   {
@@ -131,6 +137,7 @@
     "    SNOMED.set_version(\"2024-09-01\"),\n",
     "    ICD11.set_version(\"2024-09-01\"),\n",
     "    HL7FHIR.set_version(\"v4.0.1\"),\n",
+    "    GA4GH.set_version(\"v2.0\"),\n",
     "]\n",
     "\n"
    ]