diff --git a/install.ps1 b/install.ps1
index 32167f0..97980c5 100644
--- a/install.ps1
+++ b/install.ps1
@@ -53,7 +53,7 @@ function vercomp($v1, $v2) {
 }
 
 $rustVersion = $(rustc --version).Split(" ")[1]
-$minRustVersion = "1.39"
+$minRustVersion = "1.56"
 if ((vercomp $rustVersion $minRustVersion) -eq 2) {
     Write-Host "WARNING: Rust version is too old: $rustVersion - needs at least $minRustVersion"
     Write-Host "Please update Rust with 'rustup update'"
diff --git a/install.sh b/install.sh
index 1d9cff2..bf51785 100755
--- a/install.sh
+++ b/install.sh
@@ -100,7 +100,7 @@ function vercomp() {
 }
 
 RustVersion=$(rustc --version | cut -d " " -f 2)
-MinRustVersion=1.39
+MinRustVersion=1.56
 vercomp "$RustVersion" $MinRustVersion || ec=$?
 if [ ${ec:-0} -eq 2 ]
 then