diff --git a/bot.ts b/bot.ts
index 544608d..cf7b33c 100644
--- a/bot.ts
+++ b/bot.ts
@@ -4,19 +4,81 @@ import {
   bold,
   Bot,
   Context,
+  DenoKVAdapter,
   fmt,
   hydrateReply,
   ParseModeFlavor,
+  session,
+  SessionFlavor,
 } from "./deps.ts";
 import { fmtArray, formatOrdinal } from "./intl.ts";
-import { config } from "./config.ts";
 import { queue } from "./queue.ts";
+import { SdRequest } from "./sd.ts";
 
-export const bot = new Bot<ParseModeFlavor<Context>>(Deno.env.get("TG_BOT_TOKEN") ?? "");
+type AppContext = ParseModeFlavor<Context> & SessionFlavor<SessionData>;
+
+interface SessionData {
+  global: {
+    adminUsernames: string[];
+    pausedReason: string | null;
+    sdApiUrl: string;
+    maxUserJobs: number;
+    maxJobs: number;
+    defaultParams?: Partial<SdRequest>;
+  };
+  user: {
+    steps: number;
+    detail: number;
+    batchSize: number;
+  };
+}
+
+export const bot = new Bot<AppContext>(Deno.env.get("TG_BOT_TOKEN") ?? "");
 bot.use(autoQuote);
 bot.use(hydrateReply);
 bot.api.config.use(autoRetry({ maxRetryAttempts: 5, maxDelaySeconds: 60 }));
 
+const db = await Deno.openKv("./app.db");
+
+const getDefaultGlobalSession = (): SessionData["global"] => ({
+  adminUsernames: (Deno.env.get("ADMIN_USERNAMES") ?? "").split(",").filter(Boolean),
+  pausedReason: null,
+  sdApiUrl: Deno.env.get("SD_API_URL") ?? "http://127.0.0.1:7860/",
+  maxUserJobs: 3,
+  maxJobs: 20,
+  defaultParams: {
+    batch_size: 1,
+    n_iter: 1,
+    width: 128 * 2,
+    height: 128 * 3,
+    steps: 20,
+    cfg_scale: 9,
+    send_images: true,
+    negative_prompt: "boring_e621_fluffyrock_v4 boring_e621_v4",
+  },
+});
+
+bot.use(session<SessionData, AppContext>({
+  type: "multi",
+  global: {
+    getSessionKey: () => "global",
+    initial: getDefaultGlobalSession,
+    storage: new DenoKVAdapter(db),
+  },
+  user: {
+    initial: () => ({
+      steps: 20,
+      detail: 8,
+      batchSize: 2,
+    }),
+  },
+}));
+
+export async function getGlobalSession(): Promise<SessionData["global"]> {
+  const entry = await db.get<SessionData["global"]>(["sessions", "global"]);
+  return entry.value ?? getDefaultGlobalSession();
+}
+
 bot.api.setMyShortDescription("I can generate furry images from text");
 bot.api.setMyDescription(
   "I can generate furry images from text. Send /txt2img to generate an image.",
@@ -24,6 +86,7 @@ bot.api.setMyDescription(
 bot.api.setMyCommands([
   { command: "txt2img", description: "Generate an image" },
   { command: "queue", description: "Show the current queue" },
+  { command: "sdparams", description: "Show the current SD parameters" },
 ]);
 
 bot.command("start", (ctx) => ctx.reply("Hello! Use the /txt2img command to generate an image"));
@@ -32,8 +95,9 @@ bot.command("txt2img", async (ctx) => {
   if (!ctx.from?.id) {
     return ctx.reply("I don't know who you are");
   }
+  const config = ctx.session.global;
   if (config.pausedReason != null) {
-    return ctx.reply(`I'm paused: ${config.pausedReason}`);
+    return ctx.reply(`I'm paused: ${config.pausedReason || "No reason given"}`);
   }
   if (queue.length >= config.maxJobs) {
     return ctx.reply(
@@ -67,9 +131,9 @@ bot.command("txt2img", async (ctx) => {
   console.log(`Enqueued job for ${userName} in chat ${chatName}`);
 });
 
-bot.command("queue", async (ctx) => {
+bot.command("queue", (ctx) => {
   if (queue.length === 0) return ctx.reply("Queue is empty");
-  return await ctx.replyFmt(
+  return ctx.replyFmt(
     fmt`Current queue:\n\n${
       fmtArray(
         queue.map((job, index) =>
@@ -81,22 +145,141 @@ bot.command("queue", async (ctx) => {
   );
 });
 
-bot.command("pause", async (ctx) => {
+bot.command("pause", (ctx) => {
   if (!ctx.from?.username) return;
+  const config = ctx.session.global;
   if (!config.adminUsernames.includes(ctx.from.username)) return;
   if (config.pausedReason != null) {
-    return await ctx.reply(`Already paused: ${config.pausedReason}`);
+    return ctx.reply(`Already paused: ${config.pausedReason}`);
   }
   config.pausedReason = ctx.match ?? "No reason given";
-  return await ctx.reply("Paused");
+  return ctx.reply("Paused");
 });
 
-bot.command("resume", async (ctx) => {
+bot.command("resume", (ctx) => {
   if (!ctx.from?.username) return;
+  const config = ctx.session.global;
   if (!config.adminUsernames.includes(ctx.from.username)) return;
-  if (config.pausedReason == null) return await ctx.reply("Already running");
+  if (config.pausedReason == null) return ctx.reply("Already running");
   config.pausedReason = null;
-  return await ctx.reply("Resumed");
+  return ctx.reply("Resumed");
+});
+
+bot.command("setsdapiurl", async (ctx) => {
+  if (!ctx.from?.username) return;
+  const config = ctx.session.global;
+  if (!config.adminUsernames.includes(ctx.from.username)) return;
+  if (!ctx.match) return ctx.reply("Please specify an URL");
+  let url: URL;
+  try {
+    url = new URL(ctx.match);
+  } catch {
+    return ctx.reply("Invalid URL");
+  }
+  let resp: Response;
+  try {
+    resp = await fetch(new URL("config", url));
+  } catch (err) {
+    return ctx.reply(`Could not connect: ${err}`);
+  }
+  if (!resp.ok) {
+    return ctx.reply(`Could not connect: ${resp.status} ${resp.statusText}`);
+  }
+  let data: unknown;
+  try {
+    data = await resp.json();
+  } catch {
+    return ctx.reply("Invalid response from API");
+  }
+  if (data != null && typeof data === "object" && "version" in data) {
+    config.sdApiUrl = url.toString();
+    return ctx.reply(`Now using SD at ${url} running version ${data.version}`);
+  } else {
+    return ctx.reply("Invalid response from API");
+  }
+});
+
+bot.command("setsdparam", (ctx) => {
+  if (!ctx.from?.username) return;
+  const config = ctx.session.global;
+  if (!config.adminUsernames.includes(ctx.from.username)) return;
+  let [param = "", value] = ctx.match.split("=", 2).map((s) => s.trim());
+  if (!param) return ctx.reply("Please specify a parameter");
+  if (value == null) return ctx.reply("Please specify a value after the =");
+  param = param.toLowerCase().replace(/[\s_]+/g, "");
+  if (config.defaultParams == null) config.defaultParams = {};
+  switch (param) {
+    case "steps": {
+      const steps = parseInt(value);
+      if (isNaN(steps)) return ctx.reply("Invalid number value");
+      if (steps > 100) return ctx.reply("Steps must be less than 100");
+      if (steps < 10) return ctx.reply("Steps must be greater than 10");
+      config.defaultParams.steps = steps;
+      return ctx.reply("Steps set to " + steps);
+    }
+    case "detail":
+    case "cfgscale": {
+      const detail = parseInt(value);
+      if (isNaN(detail)) return ctx.reply("Invalid number value");
+      if (detail > 20) return ctx.reply("Detail must be less than 20");
+      if (detail < 1) return ctx.reply("Detail must be greater than 1");
+      config.defaultParams.cfg_scale = detail;
+      return ctx.reply("Detail set to " + detail);
+    }
+    case "niter":
+    case "niters": {
+      const nIter = parseInt(value);
+      if (isNaN(nIter)) return ctx.reply("Invalid number value");
+      if (nIter > 10) return ctx.reply("Iterations must be less than 10");
+      if (nIter < 1) return ctx.reply("Iterations must be greater than 1");
+      config.defaultParams.n_iter = nIter;
+      return ctx.reply("Iterations set to " + nIter);
+    }
+    case "batchsize": {
+      const batchSize = parseInt(value);
+      if (isNaN(batchSize)) return ctx.reply("Invalid number value");
+      if (batchSize > 8) return ctx.reply("Batch size must be less than 8");
+      if (batchSize < 1) return ctx.reply("Batch size must be greater than 1");
+      config.defaultParams.batch_size = batchSize;
+      return ctx.reply("Batch size set to " + batchSize);
+    }
+    case "size": {
+      let [width, height] = value.split("x", 2).map((s) => parseInt(s.trim()));
+      if (!width || !height || isNaN(width) || isNaN(height)) {
+        return ctx.reply("Invalid size value");
+      }
+      if (width > 2048) return ctx.reply("Width must be less than 2048");
+      if (height > 2048) return ctx.reply("Height must be less than 2048");
+      // find closest multiple of 64
+      width = Math.round(width / 64) * 64;
+      height = Math.round(height / 64) * 64;
+      if (width <= 0) return ctx.reply("Width too small");
+      if (height <= 0) return ctx.reply("Height too small");
+      config.defaultParams.width = width;
+      config.defaultParams.height = height;
+      return ctx.reply(`Size set to ${width}x${height}`);
+    }
+    case "negativeprompt": {
+      config.defaultParams.negative_prompt = value;
+      return ctx.reply(`Negative prompt set to: ${value}`);
+    }
+    default: {
+      return ctx.reply("Invalid parameter");
+    }
+  }
+});
+
+bot.command("sdparams", (ctx) => {
+  if (!ctx.from?.username) return;
+  const config = ctx.session.global;
+  return ctx.replyFmt(fmt`Current config:\n\n${
+    fmtArray(
+      Object.entries(config.defaultParams ?? {}).map(([key, value]) =>
+        fmt`${bold(key)} = ${String(value)}`
+      ),
+      "\n",
+    )
+  }`);
 });
 
 bot.catch((err) => {
diff --git a/config.ts b/config.ts
deleted file mode 100644
index 4d41272..0000000
--- a/config.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-export const config: Config = {
-  adminUsernames: (Deno.env.get("ADMIN_USERNAMES") ?? "").split(",").filter(Boolean),
-  pausedReason: null,
-  sdApiUrl: Deno.env.get("SD_API_URL") ?? "http://127.0.0.1:7860/",
-  maxUserJobs: 3,
-  maxJobs: 20,
-};
-
-interface Config {
-  adminUsernames: string[];
-  pausedReason: string | null;
-  sdApiUrl: string;
-  maxUserJobs: number;
-  maxJobs: number;
-}
diff --git a/deno.jsonc b/deno.jsonc
index 9be0600..497b91f 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -1,7 +1,7 @@
 {
   "tasks": {
-    "dev": "deno run --watch --allow-env --allow-read --allow-net main.ts",
-    "start": "deno run --allow-env --allow-read --allow-net main.ts"
+    "dev": "deno run --watch --unstable --allow-env --allow-read --allow-write --allow-net main.ts",
+    "start": "deno run --unstable --allow-env --allow-read --allow-write --allow-net main.ts"
   },
   "fmt": {
     "lineWidth": 100
diff --git a/deps.ts b/deps.ts
index faa9429..b84b8b8 100644
--- a/deps.ts
+++ b/deps.ts
@@ -1,4 +1,6 @@
 export * from "https://deno.land/x/grammy@v1.18.1/mod.ts";
 export * from "https://deno.land/x/grammy_autoquote@v1.1.2/mod.ts";
 export * from "https://deno.land/x/grammy_parse_mode@1.7.1/mod.ts";
+export * from "https://deno.land/x/grammy_storages@v2.3.1/denokv/src/mod.ts";
 export { autoRetry } from "https://esm.sh/@grammyjs/auto-retry@1.1.1";
+export * from "https://deno.land/x/zod/mod.ts";
diff --git a/queue.ts b/queue.ts
index a1e0db5..57dcbab 100644
--- a/queue.ts
+++ b/queue.ts
@@ -1,6 +1,5 @@
 import { InputFile, InputMediaBuilder } from "./deps.ts";
-import { config } from "./config.ts";
-import { bot } from "./bot.ts";
+import { bot, getGlobalSession } from "./bot.ts";
 import { formatOrdinal } from "./intl.ts";
 import { SdProgressResponse, SdRequest, txt2img } from "./sd.ts";
 import { extFromMimeType, mimeTypeFromBase64 } from "./mimeType.ts";
@@ -56,12 +55,12 @@ export async function processQueue() {
           )
           .catch(() => {});
       };
+      const config = await getGlobalSession();
       const response = await txt2img(
         config.sdApiUrl,
-        { ...defaultParams, ...job.params },
+        { ...config.defaultParams, ...job.params },
         onProgress,
       );
-
       console.log(
         `Generated ${response.images.length} images (${
           response.images
@@ -69,11 +68,11 @@ export async function processQueue() {
             .join(", ")
         }) for ${job.userName} in ${job.chatName}: ${job.params.prompt?.replace(/\s+/g, " ")}`,
       );
-      bot.api.editMessageText(
+      await bot.api.editMessageText(
         job.chatId,
         progressMessage.message_id,
         `Uploading your images...`,
-      );
+      ).catch(() => {});
       const inputFiles = await Promise.all(
         response.images.map(async (imageBase64, idx) => {
           const mimeType = mimeTypeFromBase64(imageBase64);
@@ -110,14 +109,3 @@ export async function processQueue() {
     }
   }
 }
-
-const defaultParams: Partial<SdRequest> = {
-  batch_size: 1,
-  n_iter: 1,
-  width: 128 * 2,
-  height: 128 * 3,
-  steps: 20,
-  cfg_scale: 9,
-  send_images: true,
-  negative_prompt: "boring_e621_fluffyrock_v4 boring_e621_v4",
-};