diff --git a/cross-link_ms-ambiguity-colab.ipynb b/cross-link_ms-ambiguity-colab.ipynb
index 9e19ee2..8f3289e 100644
--- a/cross-link_ms-ambiguity-colab.ipynb
+++ b/cross-link_ms-ambiguity-colab.ipynb
@@ -336,7 +336,7 @@
         }
       },
       "source": [
-        "Now, we know that there are two copies of ProtA, which we called ProtA.1 and ProtA.2 in our IMP [Hierarchy](https://integrativemodeling.org/2.19.0/doc/ref/classIMP_1_1atom_1_1Hierarchy.html). Let's rename ProtA into ProtA.1 for both ends of each cross-link:"
+        "Now, we know that there are two copies of ProtA, which we called ProtA.1 and ProtA.2 in our IMP [Hierarchy](https://integrativemodeling.org/2.20.0/doc/ref/classIMP_1_1atom_1_1Hierarchy.html). Let's rename ProtA into ProtA.1 for both ends of each cross-link:"
       ]
     },
     {
diff --git a/cross-link_ms-ambiguity.ipynb b/cross-link_ms-ambiguity.ipynb
index 3a2680c..68e99f1 100644
--- a/cross-link_ms-ambiguity.ipynb
+++ b/cross-link_ms-ambiguity.ipynb
@@ -315,7 +315,7 @@
         }
       },
       "source": [
-        "Now, we know that there are two copies of ProtA, which we called ProtA.1 and ProtA.2 in our IMP [Hierarchy](https://integrativemodeling.org/2.19.0/doc/ref/classIMP_1_1atom_1_1Hierarchy.html). Let's rename ProtA into ProtA.1 for both ends of each cross-link:"
+        "Now, we know that there are two copies of ProtA, which we called ProtA.1 and ProtA.2 in our IMP [Hierarchy](https://integrativemodeling.org/2.20.0/doc/ref/classIMP_1_1atom_1_1Hierarchy.html). Let's rename ProtA into ProtA.1 for both ends of each cross-link:"
       ]
     },
     {
diff --git a/support/tutorial_tools b/support/tutorial_tools
index 45c8d71..077d2b3 160000
--- a/support/tutorial_tools
+++ b/support/tutorial_tools
@@ -1 +1 @@
-Subproject commit 45c8d719f28f313d3f3c69e94fdf96004d2e9aac
+Subproject commit 077d2b3d7bf02c71fec866026f5e813393eb1f1d