diff --git a/.ci_support/linux_64_python3.10.____cpython.yaml b/.ci_support/linux_64_python3.10.____cpython.yaml
index a28794f..3a33c44 100644
--- a/.ci_support/linux_64_python3.10.____cpython.yaml
+++ b/.ci_support/linux_64_python3.10.____cpython.yaml
@@ -19,7 +19,7 @@ docker_image:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/linux_64_python3.11.____cpython.yaml b/.ci_support/linux_64_python3.11.____cpython.yaml
index 72e06f0..9dd8b40 100644
--- a/.ci_support/linux_64_python3.11.____cpython.yaml
+++ b/.ci_support/linux_64_python3.11.____cpython.yaml
@@ -19,7 +19,7 @@ docker_image:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/linux_64_python3.12.____cpython.yaml b/.ci_support/linux_64_python3.12.____cpython.yaml
index 3b939b5..cf67c95 100644
--- a/.ci_support/linux_64_python3.12.____cpython.yaml
+++ b/.ci_support/linux_64_python3.12.____cpython.yaml
@@ -19,7 +19,7 @@ docker_image:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/linux_64_python3.13.____cp313.yaml b/.ci_support/linux_64_python3.13.____cp313.yaml
index 9814c86..3b11b7c 100644
--- a/.ci_support/linux_64_python3.13.____cp313.yaml
+++ b/.ci_support/linux_64_python3.13.____cp313.yaml
@@ -19,7 +19,7 @@ docker_image:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/linux_64_python3.14.____cp314.yaml b/.ci_support/linux_64_python3.14.____cp314.yaml
index f4b123e..a890d39 100644
--- a/.ci_support/linux_64_python3.14.____cp314.yaml
+++ b/.ci_support/linux_64_python3.14.____cp314.yaml
@@ -19,7 +19,7 @@ docker_image:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/migrations/libboost190.yaml b/.ci_support/migrations/libboost190.yaml
new file mode 100644
index 0000000..7e3ad78
--- /dev/null
+++ b/.ci_support/migrations/libboost190.yaml
@@ -0,0 +1,12 @@
+__migrator:
+  build_number: 1
+  kind: version
+  commit_message: "Rebuild for libboost 1.90"
+  migration_number: 1
+libboost_devel:
+- "1.90"
+libboost_headers:
+- "1.90"
+libboost_python_devel:
+- "1.90"
+migrator_ts: 1776998221.848913
diff --git a/.ci_support/osx_64_python3.10.____cpython.yaml b/.ci_support/osx_64_python3.10.____cpython.yaml
index 67505e4..07d6c0d 100644
--- a/.ci_support/osx_64_python3.10.____cpython.yaml
+++ b/.ci_support/osx_64_python3.10.____cpython.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_64_python3.11.____cpython.yaml b/.ci_support/osx_64_python3.11.____cpython.yaml
index 8de3ae2..239272e 100644
--- a/.ci_support/osx_64_python3.11.____cpython.yaml
+++ b/.ci_support/osx_64_python3.11.____cpython.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_64_python3.12.____cpython.yaml b/.ci_support/osx_64_python3.12.____cpython.yaml
index ccdaa39..ea7a0f0 100644
--- a/.ci_support/osx_64_python3.12.____cpython.yaml
+++ b/.ci_support/osx_64_python3.12.____cpython.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_64_python3.13.____cp313.yaml b/.ci_support/osx_64_python3.13.____cp313.yaml
index 9d07239..00c4ff9 100644
--- a/.ci_support/osx_64_python3.13.____cp313.yaml
+++ b/.ci_support/osx_64_python3.13.____cp313.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_64_python3.14.____cp314.yaml b/.ci_support/osx_64_python3.14.____cp314.yaml
index 49a6138..118910d 100644
--- a/.ci_support/osx_64_python3.14.____cp314.yaml
+++ b/.ci_support/osx_64_python3.14.____cp314.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_arm64_python3.10.____cpython.yaml b/.ci_support/osx_arm64_python3.10.____cpython.yaml
index 6d1d4de..f06e41f 100644
--- a/.ci_support/osx_arm64_python3.10.____cpython.yaml
+++ b/.ci_support/osx_arm64_python3.10.____cpython.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_arm64_python3.11.____cpython.yaml b/.ci_support/osx_arm64_python3.11.____cpython.yaml
index 57b54bd..3b0ae70 100644
--- a/.ci_support/osx_arm64_python3.11.____cpython.yaml
+++ b/.ci_support/osx_arm64_python3.11.____cpython.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_arm64_python3.12.____cpython.yaml b/.ci_support/osx_arm64_python3.12.____cpython.yaml
index af8476c..f8944e7 100644
--- a/.ci_support/osx_arm64_python3.12.____cpython.yaml
+++ b/.ci_support/osx_arm64_python3.12.____cpython.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_arm64_python3.13.____cp313.yaml b/.ci_support/osx_arm64_python3.13.____cp313.yaml
index 03791a7..8135f18 100644
--- a/.ci_support/osx_arm64_python3.13.____cp313.yaml
+++ b/.ci_support/osx_arm64_python3.13.____cp313.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/osx_arm64_python3.14.____cp314.yaml b/.ci_support/osx_arm64_python3.14.____cp314.yaml
index d209983..65b482f 100644
--- a/.ci_support/osx_arm64_python3.14.____cp314.yaml
+++ b/.ci_support/osx_arm64_python3.14.____cp314.yaml
@@ -21,7 +21,7 @@ cxx_compiler_version:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 llvm_openmp:
 - '19'
 macos_machine:
diff --git a/.ci_support/win_64_python3.10.____cpython.yaml b/.ci_support/win_64_python3.10.____cpython.yaml
index a55bd1a..66fb4b0 100644
--- a/.ci_support/win_64_python3.10.____cpython.yaml
+++ b/.ci_support/win_64_python3.10.____cpython.yaml
@@ -11,7 +11,7 @@ cxx_compiler:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/win_64_python3.11.____cpython.yaml b/.ci_support/win_64_python3.11.____cpython.yaml
index 6529756..d8483c7 100644
--- a/.ci_support/win_64_python3.11.____cpython.yaml
+++ b/.ci_support/win_64_python3.11.____cpython.yaml
@@ -11,7 +11,7 @@ cxx_compiler:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/win_64_python3.12.____cpython.yaml b/.ci_support/win_64_python3.12.____cpython.yaml
index 555a9b7..64c5341 100644
--- a/.ci_support/win_64_python3.12.____cpython.yaml
+++ b/.ci_support/win_64_python3.12.____cpython.yaml
@@ -11,7 +11,7 @@ cxx_compiler:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/win_64_python3.13.____cp313.yaml b/.ci_support/win_64_python3.13.____cp313.yaml
index ed2ab31..78dfa3c 100644
--- a/.ci_support/win_64_python3.13.____cp313.yaml
+++ b/.ci_support/win_64_python3.13.____cp313.yaml
@@ -11,7 +11,7 @@ cxx_compiler:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/.ci_support/win_64_python3.14.____cp314.yaml b/.ci_support/win_64_python3.14.____cp314.yaml
index da10bf5..0cfc94c 100644
--- a/.ci_support/win_64_python3.14.____cp314.yaml
+++ b/.ci_support/win_64_python3.14.____cp314.yaml
@@ -11,7 +11,7 @@ cxx_compiler:
 gmp:
 - '6'
 libboost_devel:
-- '1.86'
+- '1.90'
 mpfr:
 - '4'
 numpy:
diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index 74eb8df..e8ab06d 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -17,7 +17,7 @@ build:
     set "CONDA_PREFIX=%PREFIX:\=/%"  # [win]
     set "CMAKE_BUILD_PARALLEL_LEVEL=%CPU_COUNT%"  # [win]
     {{ PYTHON }} -m pip install . -vv --no-build-isolation --no-deps
-  number: 1
+  number: 2
   skip: true  # [py<=39]
   missing_dso_whitelist:
     - $RPATH/multipers_core.dll              # [win]