diff --git a/src/app/admin/__tests__/update-client-scopes-action.test.ts b/src/app/admin/__tests__/update-client-scopes-action.test.ts
index 5879508..6104eb0 100644
--- a/src/app/admin/__tests__/update-client-scopes-action.test.ts
+++ b/src/app/admin/__tests__/update-client-scopes-action.test.ts
@@ -88,11 +88,14 @@ describe("updateClientScopesAction", () => {
   it("allows custom scopes that match the required pattern", async () => {
     const result = await updateClientScopesAction({
       clientId: "client_internal",
-      scopes: ["openid", "profile", "tenant:write"],
+      scopes: ["openid", "profile", "r_organizationSocialAnalytics"],
     });
 
-    expect(result).toEqual({ success: "Scopes updated", data: { allowedScopes: ["openid", "profile", "tenant:write"] } });
-    expect(mockUpdateScopes).toHaveBeenCalledWith("client_internal", ["openid", "profile", "tenant:write"]);
+    expect(result).toEqual({
+      success: "Scopes updated",
+      data: { allowedScopes: ["openid", "profile", "r_organizationSocialAnalytics"] },
+    });
+    expect(mockUpdateScopes).toHaveBeenCalledWith("client_internal", ["openid", "profile", "r_organizationSocialAnalytics"]);
   });
 
   it("returns an error when openid is missing", async () => {
@@ -105,7 +108,7 @@ describe("updateClientScopesAction", () => {
   it("returns an error for invalid scope formats", async () => {
     const result = await updateClientScopesAction({ clientId: "client_internal", scopes: ["openid", "invalid scope"] });
 
-    expect(result).toEqual({ error: "Scopes must match ^[a-z0-9:_-]{1,64}$: invalid scope" });
+    expect(result).toEqual({ error: "Scopes must match ^[A-Za-z0-9:_-]{1,64}$: invalid scope" });
     expect(mockUpdateScopes).not.toHaveBeenCalled();
   });
 
diff --git a/src/app/admin/actions.ts b/src/app/admin/actions.ts
index 06b6f1a..b49c26b 100644
--- a/src/app/admin/actions.ts
+++ b/src/app/admin/actions.ts
@@ -504,7 +504,7 @@ export const createClientAction = async (
     }
     const invalid = normalizedScopes.filter((scope) => !isValidScopeValue(scope));
     if (invalid.length > 0) {
-      return { error: `Scopes must match ^[a-z0-9:_-]{1,64}$: ${invalid.join(", ")}` };
+      return { error: `Scopes must match ^[A-Za-z0-9:_-]{1,64}$: ${invalid.join(", ")}` };
     }
     const canonicalScopes = ["openid", ...normalizedScopes.filter((scope) => scope !== "openid")];
     const proxyConfigResult = parsed.mode === "proxy"
@@ -1328,7 +1328,7 @@ export const updateClientScopesAction = async (
     }
     const invalid = normalized.filter((scope) => !isValidScopeValue(scope));
     if (invalid.length > 0) {
-      return { error: `Scopes must match ^[a-z0-9:_-]{1,64}$: ${invalid.join(", ")}` };
+      return { error: `Scopes must match ^[A-Za-z0-9:_-]{1,64}$: ${invalid.join(", ")}` };
     }
     const canonical = ["openid", ...normalized.filter((scope) => scope !== "openid")];
     const updated = await updateClientAllowedScopes(client.id, canonical);
diff --git a/src/app/admin/clients/[clientId]/client-forms.tsx b/src/app/admin/clients/[clientId]/client-forms.tsx
index 71709a2..1be9f65 100644
--- a/src/app/admin/clients/[clientId]/client-forms.tsx
+++ b/src/app/admin/clients/[clientId]/client-forms.tsx
@@ -1057,12 +1057,12 @@ export function UpdateClientScopesForm({
     if (!canEdit || pending) {
       return;
     }
-    const candidate = raw.trim().toLowerCase();
+    const candidate = raw.trim();
     if (!candidate) {
       return;
     }
     if (!isValidScopeValue(candidate)) {
-      dispatch({ type: "setError", value: "Scopes must match ^[a-z0-9:_-]{1,64}$" });
+      dispatch({ type: "setError", value: "Scopes must match ^[A-Za-z0-9:_-]{1,64}$" });
       return;
     }
     dispatch({ type: "add", scope: candidate });
@@ -1110,7 +1110,7 @@ export function UpdateClientScopesForm({
         <div>
           <p className="text-sm font-semibold text-foreground">Allowed scopes</p>
           <p className="text-xs text-muted-foreground">
-            openid is required. Additional scopes must match the pattern {"^[a-z0-9:_-]{1,64}$"}.
+            openid is required. Additional scopes must match the pattern {"^[A-Za-z0-9:_-]{1,64}$"}.
           </p>
         </div>
         <div className="flex flex-wrap gap-2" data-testid="scope-chip-list">
diff --git a/src/app/admin/clients/__tests__/update-client-scopes-form.test.tsx b/src/app/admin/clients/__tests__/update-client-scopes-form.test.tsx
index 50d7370..7ad567d 100644
--- a/src/app/admin/clients/__tests__/update-client-scopes-form.test.tsx
+++ b/src/app/admin/clients/__tests__/update-client-scopes-form.test.tsx
@@ -53,6 +53,22 @@ describe("UpdateClientScopesForm", () => {
     expect(mockToast).toHaveBeenCalledWith({ title: "Scopes updated", description: "Scopes saved" });
   });
 
+  it("preserves mixed-case scope input", async () => {
+    const user = userEvent.setup();
+    render(<UpdateClientScopesForm clientId="client_1" initialScopes={["openid"]} canEdit />);
+
+    await user.type(screen.getByTestId("scope-input"), "r_organizationSocialAnalytics");
+    await user.keyboard("{Enter}");
+    await user.click(screen.getByTestId("scope-save-button"));
+
+    await waitFor(() => {
+      expect(mockUpdateClientScopesAction).toHaveBeenCalledWith({
+        clientId: "client_1",
+        scopes: ["openid", "r_organizationSocialAnalytics"],
+      });
+    });
+  });
+
   it("shows an error when the action fails", async () => {
     const user = userEvent.setup();
     mockUpdateClientScopesAction.mockResolvedValueOnce({ error: "Unsupported scope" });
diff --git a/src/server/oidc/__tests__/oidc-flow.test.ts b/src/server/oidc/__tests__/oidc-flow.test.ts
index f047c35..27be6ca 100644
--- a/src/server/oidc/__tests__/oidc-flow.test.ts
+++ b/src/server/oidc/__tests__/oidc-flow.test.ts
@@ -359,6 +359,31 @@ describe("OIDC flow", () => {
     ).rejects.toThrowError("Client does not allow scopes: offline_access");
   });
 
+  it("allows mixed-case scopes in the client allowlist", async () => {
+    await prisma.client.update({
+      where: { id: clientInternalId },
+      data: { allowedScopes: ["openid", "r_organizationSocialAnalytics"] },
+    });
+    const challenge = computeS256Challenge(codeVerifier);
+    const authorize = await handleAuthorize(
+      {
+        apiResourceId,
+        clientId: CLIENT_ID,
+        redirectUri: "https://client.example.test/callback",
+        responseType: "code",
+        scope: "openid r_organizationSocialAnalytics",
+        codeChallenge: challenge,
+        codeChallengeMethod: "S256",
+        sessionToken,
+        reauthCookie: buildReauthCookie(sessionToken),
+      },
+      "https://mockauth.test",
+      `https://mockauth.test/r/${apiResourceId}/oidc/authorize?client_id=${CLIENT_ID}`,
+    );
+
+    expect(authorize.type).toBe("redirect");
+  });
+
   it("rejects scopes disabled for the client", async () => {
     await prisma.client.update({
       where: { id: clientInternalId },
diff --git a/src/server/oidc/__tests__/scopes.test.ts b/src/server/oidc/__tests__/scopes.test.ts
index 0e213a5..faa9b97 100644
--- a/src/server/oidc/__tests__/scopes.test.ts
+++ b/src/server/oidc/__tests__/scopes.test.ts
@@ -5,12 +5,12 @@ import { isSupportedScope, isValidScopeValue, normalizeScopes, SUPPORTED_SCOPES
 describe("OIDC scopes", () => {
   it("normalizes scope values", () => {
     const result = normalizeScopes([" OpenID ", "profile", "EMAIL", "profile", ""]);
-    expect(result).toEqual(["openid", "profile", "email"]);
+    expect(result).toEqual(["OpenID", "profile", "EMAIL"]);
   });
 
   it("preserves insertion order for unique scopes", () => {
-    const result = normalizeScopes(["email", "profile", "email", "openid"]);
-    expect(result).toEqual(["email", "profile", "openid"]);
+    const result = normalizeScopes(["email", "Profile", "email", "profile", "openid"]);
+    expect(result).toEqual(["email", "Profile", "profile", "openid"]);
   });
 
   it("detects supported scopes", () => {
@@ -24,7 +24,8 @@ describe("OIDC scopes", () => {
     expect(isValidScopeValue("openid")).toBe(true);
     expect(isValidScopeValue("tenant:admin")).toBe(true);
     expect(isValidScopeValue("invalid scope")).toBe(false);
-    expect(isValidScopeValue("UPPERCASE")).toBe(false);
+    expect(isValidScopeValue("UPPERCASE")).toBe(true);
+    expect(isValidScopeValue("r_organizationSocialAnalytics")).toBe(true);
     expect(isValidScopeValue("a".repeat(65))).toBe(false);
   });
 });
diff --git a/src/server/oidc/scopes.ts b/src/server/oidc/scopes.ts
index 4a380f5..63ae8eb 100644
--- a/src/server/oidc/scopes.ts
+++ b/src/server/oidc/scopes.ts
@@ -4,13 +4,13 @@ export const DEFAULT_ALLOWED_SCOPES = ["openid", "profile", "email"] as const;
 
 export type SupportedScope = (typeof SUPPORTED_SCOPES)[number];
 
-export const SCOPE_VALUE_PATTERN = /^[a-z0-9:_-]{1,64}$/;
+export const SCOPE_VALUE_PATTERN = /^[A-Za-z0-9:_-]{1,64}$/;
 
 export const normalizeScopes = (scopes: string[]): string[] => {
   const seen = new Set<string>();
   const normalized: string[] = [];
   for (const scope of scopes) {
-    const value = scope.trim().toLowerCase();
+    const value = scope.trim();
     if (!value || seen.has(value)) {
       continue;
     }