diff --git a/.github/actions/unix_impl/action.yml b/.github/actions/unix_impl/action.yml
index 7d6205f..97ebfd8 100644
--- a/.github/actions/unix_impl/action.yml
+++ b/.github/actions/unix_impl/action.yml
@@ -19,7 +19,7 @@ runs:
             make install;
             cd ../..;
         else
-            micromamba install xtensor-r==0.16.0 -c conda-forge;
+            micromamba install xtensor-r==0.17.0 -c conda-forge;
         fi
       shell: bash -e -l {0}
 
diff --git a/src/Makevars b/src/Makevars
index 25aa53b..fd2482b 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,4 +1,4 @@
 ## -*- mode: makefile; -*-
 
-PKG_CXXFLAGS = -I../inst/include --std=c++17
+PKG_CXXFLAGS = -I../inst/include --std=c++20 -D_LIBCPP_DISABLE_AVAILABILITY
 # CXX_STD = CXX14
diff --git a/src/Makevars.win b/src/Makevars.win
index 25aa53b..1fc2b6e 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -1,4 +1,4 @@
 ## -*- mode: makefile; -*-
 
-PKG_CXXFLAGS = -I../inst/include --std=c++17
+PKG_CXXFLAGS = -I../inst/include --std=c++20
 # CXX_STD = CXX14
diff --git a/src/xtensor_r_example.cpp b/src/xtensor_r_example.cpp
index f78ca11..0b1bacd 100644
--- a/src/xtensor_r_example.cpp
+++ b/src/xtensor_r_example.cpp
@@ -8,7 +8,7 @@
 
 #include <Rcpp.h>
 
-// [[Rcpp::plugins(cpp17)]]
+// [[Rcpp::plugins(cpp20)]]
 
 // [[Rcpp::export]]
 xt::rtensor<double, 2> xtensor_r_example(xt::rtensor<int, 1> tens)
diff --git a/tools/vendor b/tools/vendor
index 5255fde..e325285 100755
--- a/tools/vendor
+++ b/tools/vendor
@@ -1,7 +1,7 @@
 XTL_VERSION=0.8.1
 XSIMD_VERSION=13.2.1
-XTENSOR_VERSION=0.26.0
-XTENSOR_R_VERSION=0.16.0
+XTENSOR_VERSION=0.27.0
+XTENSOR_R_VERSION=0.17.0
 
 # xtl
 if [ -d "./inst/include/xtl" ]