diff --git a/doc/pyproject.toml b/doc/pyproject.toml
index e4771232..5b75569e 100644
--- a/doc/pyproject.toml
+++ b/doc/pyproject.toml
@@ -13,8 +13,8 @@ dependencies = [
     "matplotlib>=3.9.4",
     "nbconvert>=7.16.4",
     "networkx>=3.2.1",
-    "ommx-pyscipopt-adapter==1.6.0rc3",
-    "ommx-python-mip-adapter==1.6.0rc3",
-    "ommx-openjij-adapter==1.6.0rc3",
-    "ommx==1.6.0rc3",
+    "ommx-pyscipopt-adapter>=1.6.0",
+    "ommx-python-mip-adapter>=1.6.0",
+    "ommx-openjij-adapter>=1.6.0",
+    "ommx>=1.6.0",
 ]
diff --git a/requirements.txt b/requirements.txt
index 49c04539..f47cbc72 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -173,17 +173,17 @@ numpy==1.26.4
     #   pandas
     #   pyarrow
     #   scipy
-ommx==1.6.0rc3
+ommx==1.6.0
     # via
     #   ommx-book (pyproject.toml)
     #   ommx-openjij-adapter
     #   ommx-pyscipopt-adapter
     #   ommx-python-mip-adapter
-ommx-openjij-adapter==1.6.0rc3
+ommx-openjij-adapter==1.6.0
     # via ommx-book (pyproject.toml)
-ommx-pyscipopt-adapter==1.6.0rc3
+ommx-pyscipopt-adapter==1.6.0
     # via ommx-book (pyproject.toml)
-ommx-python-mip-adapter==1.6.0rc3
+ommx-python-mip-adapter==1.6.0
     # via ommx-book (pyproject.toml)
 openjij==0.9.2
     # via ommx-openjij-adapter