diff --git a/scripts/install_deps.ps1 b/scripts/install_deps.ps1
index e7726993c..227254e46 100644
--- a/scripts/install_deps.ps1
+++ b/scripts/install_deps.ps1
@@ -6,23 +6,26 @@ $progressPreference = "silentlyContinue"
 if ( -not (Test-Path "$PSScriptRoot\..\deps\boost") ) {
   New-Item -ItemType Directory -Force -Path "$PSScriptRoot\..\deps"
 
-  Invoke-WebRequest -URI "https://github.com/Kitware/CMake/releases/download/v3.18.2/cmake-3.18.2-win64-x64.zip" -OutFile cmake.zip
-  if ((Get-FileHash cmake.zip).Hash -ne "5f4ec834fbd9b62fbf73bc48ed459fa2ea6a86c403106c90fedc2ac76d51612d") {
+  Invoke-WebRequest -URI "https://github.com/Kitware/CMake/releases/download/v3.21.3/cmake-3.21.3-windows-x86_64.zip" -OutFile cmake.zip
+  if ((Get-FileHash cmake.zip).Hash -ne "e28178103fad901a99fb201fac04e4787d4cd4f664c5db88998c57eed68843b9") {
     throw 'Downloaded CMake source package has wrong checksum.'
   }
   tar -xf cmake.zip
-  mv cmake-3.18.2-win64-x64 "$PSScriptRoot\..\deps\cmake"
+  mv cmake-3.21.3-windows-x86_64 "$PSScriptRoot\..\deps\cmake"
+  Remove-Item cmake.zip
 
   # FIXME: The default user agent results in Artifactory treating Invoke-WebRequest as a browser
   # and serving it a page that requires JavaScript.
-  Invoke-WebRequest -URI "https://boostorg.jfrog.io/artifactory/main/release/1.77.0/source/boost_1_77_0.zip" -OutFile boost.zip -UserAgent ""
-  if ((Get-FileHash boost.zip).Hash -ne "d2886ceff60c35fc6dc9120e8faa960c1e9535f2d7ce447469eae9836110ea77") {
+  Invoke-WebRequest -URI "https://boostorg.jfrog.io/artifactory/main/release/1.78.0/source/boost_1_78_0.zip" -OutFile boost.zip -UserAgent ""
+  if ((Get-FileHash boost.zip).Hash -ne "f22143b5528e081123c3c5ed437e92f648fe69748e95fa6e2bd41484e2986cc3") {
     throw 'Downloaded Boost source package has wrong checksum.'
   }
   tar -xf boost.zip
-  cd boost_1_77_0
+  Remove-Item boost.zip
+  cd boost_1_78_0
   .\bootstrap.bat
   .\b2 -j4 -d0 link=static runtime-link=static variant=release threading=multi address-model=64 --with-filesystem --with-system --with-program_options --with-test --prefix="$PSScriptRoot\..\deps\boost" install
   if ( -not $? ) { throw "Error building boost." }
   cd ..
+  Remove-Item -LiteralPath .\boost_1_78_0 -Force -Recurse
 }