diff --git a/.github/workflows/wheels2.yml b/.github/workflows/wheels2.yml
index 9d3e3685f..9ea1b4933 100644
--- a/.github/workflows/wheels2.yml
+++ b/.github/workflows/wheels2.yml
@@ -30,7 +30,7 @@ jobs:
     - uses: actions/checkout@v3
 
     - name: Build wheels
-      uses: pypa/cibuildwheel@v2.12.0
+      uses: pypa/cibuildwheel@v2.12.2
       env:
         CIBW_BUILD: ${{ github.event.inputs.cibw_build }}
         CIBW_SKIP: ${{ github.event.inputs.cibw_skip }}
diff --git a/docs/gemmi-help.txt b/docs/gemmi-help.txt
index e783e149d..79dd99fc5 100644
--- a/docs/gemmi-help.txt
+++ b/docs/gemmi-help.txt
@@ -1,5 +1,5 @@
 $ gemmi -h
-gemmi 0.6.1.dev
+gemmi 0.6.1
 Command-line utility that accompanies the GEMMI library,
 which is a joint project of CCP4 and Global Phasing Ltd.
 Licence: Mozilla Public License 2.0.
diff --git a/include/gemmi/bond_idx.hpp b/include/gemmi/bond_idx.hpp
index 18fc677e8..4f262786e 100644
--- a/include/gemmi/bond_idx.hpp
+++ b/include/gemmi/bond_idx.hpp
@@ -6,7 +6,8 @@
 #define GEMMI_BOND_IDX_HPP_
 
 #include <map>
-#include "model.hpp"      // for Residue, Atom
+#include "model.hpp"    // for Residue, Atom
+#include "monlib.hpp"   // for MonLib
 
 namespace gemmi {
 
diff --git a/include/gemmi/version.hpp b/include/gemmi/version.hpp
index c8d360b73..6e6898c83 100644
--- a/include/gemmi/version.hpp
+++ b/include/gemmi/version.hpp
@@ -5,6 +5,6 @@
 #ifndef GEMMI_VERSION_HPP_
 #define GEMMI_VERSION_HPP_
 
-#define GEMMI_VERSION "0.6.1.dev"
+#define GEMMI_VERSION "0.6.1"
 
 #endif