diff --git a/src/Cmd.hpp b/src/Cmd.hpp
index 6e8d6887b..63129ae29 100644
--- a/src/Cmd.hpp
+++ b/src/Cmd.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include "Cmd/Add.hpp"
 #include "Cmd/Build.hpp"
 #include "Cmd/Clean.hpp"
 #include "Cmd/Fmt.hpp"
diff --git a/src/Cmd/Add.cc b/src/Cmd/Add.cc
new file mode 100644
index 000000000..689e71aa2
--- /dev/null
+++ b/src/Cmd/Add.cc
@@ -0,0 +1,200 @@
+#include "Add.hpp"
+
+#include "../Logger.hpp"
+#include "../Manifest.hpp"
+#include "../Rustify.hpp"
+#include "Common.hpp"
+
+#include <algorithm>
+#include <cstdlib>
+#include <fstream>
+#include <toml.hpp>
+#include <vector>
+
+static int addMain(std::span<const StringRef> args);
+
+const Subcmd ADD_CMD =
+    Subcmd{ "add" }
+        .setDesc("Add dependencies to poac.toml")
+        .setArg(Arg{ "args" }
+                    .setDesc("Dependencies to add")
+                    .setRequired(true)
+                    .setVariadic(true))
+        .addOpt(Opt{ "--sys" }.setDesc("Use system dependency"))
+        .addOpt(Opt{ "--version" }.setDesc(
+            "Dependency version (Only used with system-dependencies)"
+        ))
+        .addOpt(
+            Opt{ "--tag" }.setDesc("Specify a git tag").setPlaceholder("<TAG>")
+        )
+        .addOpt(Opt{ "--rev" }
+                    .setDesc("Specify a git revision")
+                    .setPlaceholder("<REVISION>"))
+        .addOpt(Opt{ "--branch" }
+                    .setDesc("Specify a branch of the git repository")
+                    .setPlaceholder("<BRANCH_NAME>"))
+        .setMainFn(addMain);
+
+static Option<String>
+getNextArg(
+    std::span<const StringRef>::iterator& itr,
+    const std::span<const StringRef>::iterator& end
+) {
+  if (++itr == end) {
+    return None;
+  }
+  return String(*itr);
+}
+
+static inline std::optional<int>
+handleNextArg(
+    std::span<const StringRef>::iterator& itr,
+    const std::span<const StringRef>::iterator& end, String& arg
+) {
+  if (const auto nextArg = getNextArg(itr, end)) {
+    arg = *nextArg;
+    return std::nullopt;
+  } else {
+    return ADD_CMD.missingArgumentForOpt(*--itr);
+  }
+}
+
+static inline void
+handleDependency(HashSet<StringRef>& newDeps, const StringRef dep) {
+  if (newDeps.find(dep) != newDeps.end()) {
+    logger::warn(
+        "The dependency `" + String(dep) + "` is already in the poac.toml"
+    );
+  } else {
+    newDeps.insert(dep);
+  }
+}
+
+static const String
+getDependencyGitUrl(const StringRef dep) {
+  if (dep.find("://") == String::npos) {
+    // check if atleast in "user/repo" format
+    if (dep.find('/') == String::npos) {
+      logger::error("Invalid dependency: " + String(dep));
+      return "";
+    }
+
+    return "https://github.com/" + String(dep) + ".git";
+  }
+  return String(dep);
+}
+
+static const String
+getDependencyName(const StringRef dep) {
+  String name;
+  if (dep.find("://") == String::npos) {
+    name = dep.substr(dep.find_last_of('/') + 1);
+  } else {
+    name = dep.substr(
+        dep.find_last_of('/') + 1, dep.find(".git") - dep.find_last_of('/') - 1
+    );
+  }
+
+  // Remove trailing '.git' if it exists
+  if (name.ends_with(".git")) {
+    name = name.substr(0, name.size() - 4);
+  }
+
+  return name;
+}
+
+static int
+addMain(std::span<const StringRef> args) {
+  if (args.empty()) {
+    logger::error("No dependencies to add");
+    return 0;
+  }
+
+  HashSet<StringRef> newDeps = {};
+
+  bool isSystemDependency = false;
+  String version; // Only used with system-dependencies
+
+  String tag;
+  String rev;
+  String branch;
+
+  for (auto itr = args.begin(); itr != args.end(); ++itr) {
+    if (const auto res = Cli::handleGlobalOpts(itr, args.end(), "add")) {
+      if (res.value() == Cli::CONTINUE) {
+        continue;
+      } else {
+        return res.value();
+      }
+    } else if (*itr == "--sys") {
+      isSystemDependency = true;
+    } else if (*itr == "--version" || *itr == "-v") {
+      if (auto res = handleNextArg(itr, args.end(), version); res.has_value()) {
+        return res.value();
+      }
+    } else if (*itr == "--tag") {
+      if (auto res = handleNextArg(itr, args.end(), tag); res.has_value()) {
+        return res.value();
+      }
+    } else if (*itr == "--rev") {
+      if (auto res = handleNextArg(itr, args.end(), rev); res.has_value()) {
+        return res.value();
+      }
+    } else if (*itr == "--branch") {
+      if (auto res = handleNextArg(itr, args.end(), branch); res.has_value()) {
+        return res.value();
+      }
+    } else {
+      handleDependency(newDeps, *itr);
+    }
+  }
+
+  toml::value depData = toml::table{};
+
+  if (isSystemDependency) {
+    if (version.empty()) {
+      logger::error("The `--version` option is required for system dependencies"
+      );
+      return EXIT_FAILURE;
+    }
+    depData["version"] = version;
+    depData["system"] = true;
+  } else {
+    if (!tag.empty()) {
+      depData["tag"] = tag;
+    }
+    if (!rev.empty()) {
+      depData["rev"] = rev;
+    }
+    if (!branch.empty()) {
+      depData["branch"] = branch;
+    }
+  }
+
+  auto data = toml::parse(getManifestPath());
+  auto& deps = toml::find<toml::table>(data, "dependencies");
+
+  for (const auto& dep : newDeps) {
+
+    if (!isSystemDependency) {
+      const String gitUrl = getDependencyGitUrl(dep);
+      const String depName = getDependencyName(dep);
+
+      if (gitUrl.empty() || depName.empty()) {
+        return EXIT_FAILURE;
+      }
+
+      deps[depName] = depData;
+      deps[depName]["git"] = gitUrl;
+    } else {
+      deps[String(dep)] = depData;
+    }
+  }
+
+  std::ofstream ofs(getManifestPath());
+  ofs << toml::format(data);
+
+  logger::info("Added", "to the poac.toml");
+
+  return EXIT_SUCCESS;
+}
diff --git a/src/Cmd/Add.hpp b/src/Cmd/Add.hpp
new file mode 100644
index 000000000..3525eb96c
--- /dev/null
+++ b/src/Cmd/Add.hpp
@@ -0,0 +1,5 @@
+#pragma once
+
+#include "../Cli.hpp"
+
+extern const Subcmd ADD_CMD;
diff --git a/src/main.cc b/src/main.cc
index b47522d3d..aa722a559 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -41,6 +41,7 @@ getCli() noexcept {
                       .setDesc("List all subcommands")
                       .setGlobal(false)
                       .setHidden(true))
+          .addSubcmd(ADD_CMD)
           .addSubcmd(BUILD_CMD)
           .addSubcmd(CLEAN_CMD)
           .addSubcmd(FMT_CMD)