diff --git a/cross-link_ms-ambiguity-colab.ipynb b/cross-link_ms-ambiguity-colab.ipynb
index 8f3289e..b57e00b 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/2.20.0/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/2.20.1/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 68e99f1..39d6280 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/2.20.0/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/2.20.1/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 077d2b3..d29453f 160000
--- a/support/tutorial_tools
+++ b/support/tutorial_tools
@@ -1 +1 @@
-Subproject commit 077d2b3d7bf02c71fec866026f5e813393eb1f1d
+Subproject commit d29453f35e1417caf187d4131ab16a19325066de