diff --git a/.github/actions/setup-d-compiler/action.yml b/.github/actions/setup-d-compiler/action.yml
index 20f548e..32c72f1 100644
--- a/.github/actions/setup-d-compiler/action.yml
+++ b/.github/actions/setup-d-compiler/action.yml
@@ -11,7 +11,7 @@ runs:
   steps:
     - uses: dlang-community/setup-dlang@v1
       with:
-        compiler: ldc-1.34.0
+        compiler: ldc-1.41.0-beta1
 
     - if: inputs.target-triple == 'aarch64-linux-gnu'
       name: "Set-up AArch64-linux cross-compiler."
diff --git a/.github/actions/target-aarch64-linux-gnu/action.yml b/.github/actions/target-aarch64-linux-gnu/action.yml
index 5ede231..79a7bed 100644
--- a/.github/actions/target-aarch64-linux-gnu/action.yml
+++ b/.github/actions/target-aarch64-linux-gnu/action.yml
@@ -12,7 +12,7 @@ runs:
       shell: bash
       run: |
         mkdir -p $HOME/.ldc/
-        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*")
+        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*(-beta[0-9]*)?")
         cat << EOF | tee $HOME/.ldc/ldc2.conf
         "aarch64-.*-linux-gnu":
         {
diff --git a/.github/actions/target-arm64-apple-macos/action.yml b/.github/actions/target-arm64-apple-macos/action.yml
index 795c400..7a6de52 100644
--- a/.github/actions/target-arm64-apple-macos/action.yml
+++ b/.github/actions/target-arm64-apple-macos/action.yml
@@ -12,7 +12,7 @@ runs:
       shell: bash
       run: |
         mkdir -p $HOME/.ldc/
-        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*")
+        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*(-beta[0-9]*)?")
         curl -LO https://github.com/phracker/MacOSX-SDKs/releases/download/11.3/MacOSX11.0.sdk.tar.xz
         tar -xf ./MacOSX11.0.sdk.tar.xz -C $HOME
         cp $(dirname $(which ldc2))/../etc/ldc2.conf $HOME/.ldc/ldc2.conf
diff --git a/.github/actions/target-x86_64-apple-darwin/action.yml b/.github/actions/target-x86_64-apple-darwin/action.yml
index 3830c1e..27d8625 100644
--- a/.github/actions/target-x86_64-apple-darwin/action.yml
+++ b/.github/actions/target-x86_64-apple-darwin/action.yml
@@ -12,7 +12,7 @@ runs:
       shell: bash
       run: |
         mkdir -p $HOME/.ldc/
-        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*")
+        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*(-beta[0-9]*)?")
         curl -LO https://github.com/phracker/MacOSX-SDKs/releases/download/11.3/MacOSX11.0.sdk.tar.xz
         tar -xf ./MacOSX11.0.sdk.tar.xz -C $HOME
         cp $(dirname $(which ldc2))/../etc/ldc2.conf $HOME/.ldc/ldc2.conf
diff --git a/.github/actions/target-x86_64-windows-msvc/action.yml b/.github/actions/target-x86_64-windows-msvc/action.yml
index bc6d3bd..ae18b34 100644
--- a/.github/actions/target-x86_64-windows-msvc/action.yml
+++ b/.github/actions/target-x86_64-windows-msvc/action.yml
@@ -12,7 +12,7 @@ runs:
       shell: bash
       run: |
         mkdir -p $HOME/.ldc/
-        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*")
+        LDC_VERSION=$(ldc2 --version | head -n 1 | grep -oE "[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*(-beta[0-9]*)?")
         cat << EOF | tee $HOME/.ldc/ldc2.conf
         "x86_64-.*-windows-msvc":
         {
diff --git a/dub.json b/dub.json
index 690cd16..7ee4744 100644
--- a/dub.json
+++ b/dub.json
@@ -23,7 +23,7 @@
         },
         "provision": {
             "repository": "git+https://github.com/Dadoum/Provision.git",
-            "version": "645d56d8e8c86c057893321843db00b21f1aaeb2"
+            "version": "6b899c20a26aba8d2640188c75d184267e57fc06"
         },
         "requests": "~>2.1",
         "slf4d": "~>2"
diff --git a/dub.selections.json b/dub.selections.json
index c6a6d7d..b3ab13d 100644
--- a/dub.selections.json
+++ b/dub.selections.json
@@ -32,7 +32,7 @@
 		"plist": "~master",
 		"plist-d": {"version":"6fdaa60d62bbf7c55044069e8f03cbe74401c444","repository":"git+https://github.com/Dadoum/libplist-d.git"},
 		"progress": "5.0.2",
-		"provision": {"version":"645d56d8e8c86c057893321843db00b21f1aaeb2","repository":"git+https://github.com/Dadoum/Provision.git"},
+		"provision": {"version":"6b899c20a26aba8d2640188c75d184267e57fc06","repository":"git+https://github.com/Dadoum/Provision.git"},
 		"requests": "2.1.2",
 		"sideloader": {"path":"../../"},
 		"silly": "1.2.0-dev.2",
diff --git a/frontends/cli/dub.selections.json b/frontends/cli/dub.selections.json
index c6a6d7d..b3ab13d 100644
--- a/frontends/cli/dub.selections.json
+++ b/frontends/cli/dub.selections.json
@@ -32,7 +32,7 @@
 		"plist": "~master",
 		"plist-d": {"version":"6fdaa60d62bbf7c55044069e8f03cbe74401c444","repository":"git+https://github.com/Dadoum/libplist-d.git"},
 		"progress": "5.0.2",
-		"provision": {"version":"645d56d8e8c86c057893321843db00b21f1aaeb2","repository":"git+https://github.com/Dadoum/Provision.git"},
+		"provision": {"version":"6b899c20a26aba8d2640188c75d184267e57fc06","repository":"git+https://github.com/Dadoum/Provision.git"},
 		"requests": "2.1.2",
 		"sideloader": {"path":"../../"},
 		"silly": "1.2.0-dev.2",
diff --git a/frontends/dlangui/dub.selections.json b/frontends/dlangui/dub.selections.json
index c6a6d7d..b3ab13d 100644
--- a/frontends/dlangui/dub.selections.json
+++ b/frontends/dlangui/dub.selections.json
@@ -32,7 +32,7 @@
 		"plist": "~master",
 		"plist-d": {"version":"6fdaa60d62bbf7c55044069e8f03cbe74401c444","repository":"git+https://github.com/Dadoum/libplist-d.git"},
 		"progress": "5.0.2",
-		"provision": {"version":"645d56d8e8c86c057893321843db00b21f1aaeb2","repository":"git+https://github.com/Dadoum/Provision.git"},
+		"provision": {"version":"6b899c20a26aba8d2640188c75d184267e57fc06","repository":"git+https://github.com/Dadoum/Provision.git"},
 		"requests": "2.1.2",
 		"sideloader": {"path":"../../"},
 		"silly": "1.2.0-dev.2",
diff --git a/frontends/gtk/dub.selections.json b/frontends/gtk/dub.selections.json
index c6a6d7d..b3ab13d 100644
--- a/frontends/gtk/dub.selections.json
+++ b/frontends/gtk/dub.selections.json
@@ -32,7 +32,7 @@
 		"plist": "~master",
 		"plist-d": {"version":"6fdaa60d62bbf7c55044069e8f03cbe74401c444","repository":"git+https://github.com/Dadoum/libplist-d.git"},
 		"progress": "5.0.2",
-		"provision": {"version":"645d56d8e8c86c057893321843db00b21f1aaeb2","repository":"git+https://github.com/Dadoum/Provision.git"},
+		"provision": {"version":"6b899c20a26aba8d2640188c75d184267e57fc06","repository":"git+https://github.com/Dadoum/Provision.git"},
 		"requests": "2.1.2",
 		"sideloader": {"path":"../../"},
 		"silly": "1.2.0-dev.2",
diff --git a/frontends/qt/dub.selections.json b/frontends/qt/dub.selections.json
index c6a6d7d..b3ab13d 100644
--- a/frontends/qt/dub.selections.json
+++ b/frontends/qt/dub.selections.json
@@ -32,7 +32,7 @@
 		"plist": "~master",
 		"plist-d": {"version":"6fdaa60d62bbf7c55044069e8f03cbe74401c444","repository":"git+https://github.com/Dadoum/libplist-d.git"},
 		"progress": "5.0.2",
-		"provision": {"version":"645d56d8e8c86c057893321843db00b21f1aaeb2","repository":"git+https://github.com/Dadoum/Provision.git"},
+		"provision": {"version":"6b899c20a26aba8d2640188c75d184267e57fc06","repository":"git+https://github.com/Dadoum/Provision.git"},
 		"requests": "2.1.2",
 		"sideloader": {"path":"../../"},
 		"silly": "1.2.0-dev.2",
diff --git a/frontends/swiftui/dub.selections.json b/frontends/swiftui/dub.selections.json
index c6a6d7d..b3ab13d 100644
--- a/frontends/swiftui/dub.selections.json
+++ b/frontends/swiftui/dub.selections.json
@@ -32,7 +32,7 @@
 		"plist": "~master",
 		"plist-d": {"version":"6fdaa60d62bbf7c55044069e8f03cbe74401c444","repository":"git+https://github.com/Dadoum/libplist-d.git"},
 		"progress": "5.0.2",
-		"provision": {"version":"645d56d8e8c86c057893321843db00b21f1aaeb2","repository":"git+https://github.com/Dadoum/Provision.git"},
+		"provision": {"version":"6b899c20a26aba8d2640188c75d184267e57fc06","repository":"git+https://github.com/Dadoum/Provision.git"},
 		"requests": "2.1.2",
 		"sideloader": {"path":"../../"},
 		"silly": "1.2.0-dev.2",
diff --git a/source/server/appleaccount.d b/source/server/appleaccount.d
index 0efe460..89bd71c 100644
--- a/source/server/appleaccount.d
+++ b/source/server/appleaccount.d
@@ -159,7 +159,7 @@ package class AppleAccount {
             AppleSecondaryActionResponse delegate(string) submitCode;
             if (urlBagKey == "trustedDeviceSecondaryAuth") {
                 submitCode = (string code) {
-                    request.headers["security-code"] = code;
+                    request.addHeaders([ "security-code": code ]);
                     auto codeValidationPlist = Plist.fromXml(request.get(urls["validateCode"]).responseBody().data!string()).dict();
                     log.traceF!"Trusted device 2FA response: %s"(codeValidationPlist.toXml());
                     auto resultCode = codeValidationPlist["ec"].uinteger().native();