diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 3fea0ea3..162d6bf3 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -711,6 +711,7 @@ bool windowRuleValid(const std::string& RULE) {
         && RULE.find("opacity") != 0
         && RULE.find("move") != 0
         && RULE.find("size") != 0
+        && RULE.find("minsize") != 0
         && RULE.find("pseudo") != 0
         && RULE.find("monitor") != 0
         && RULE != "nofocus"
diff --git a/src/events/Windows.cpp b/src/events/Windows.cpp
index 9b58d0f5..54da4747 100644
--- a/src/events/Windows.cpp
+++ b/src/events/Windows.cpp
@@ -249,6 +249,21 @@ void Events::listener_mapWindow(void* owner, void* data) {
                 } catch (...) {
                     Debug::log(LOG, "Rule size failed, rule: %s -> %s", r.szRule.c_str(), r.szValue.c_str());
                 }
+            } else if (r.szRule.find("minsize") == 0) {
+                try {
+                    const auto VALUE = r.szRule.substr(r.szRule.find(" ") + 1);
+                    const auto SIZEXSTR = VALUE.substr(0, VALUE.find(" "));
+                    const auto SIZEYSTR = VALUE.substr(VALUE.find(" ") + 1);
+
+                    const auto SIZE = Vector2D(std::max((double)std::stoll(SIZEXSTR), PWINDOW->m_vRealSize.goalv().x), std::max((double)std::stoll(SIZEYSTR), PWINDOW->m_vRealSize.goalv().y));
+
+                    PWINDOW->m_vRealSize = SIZE;
+                    g_pXWaylandManager->setWindowSize(PWINDOW, PWINDOW->m_vRealSize.goalv());
+
+                    PWINDOW->m_bHidden = false;
+                } catch (...) {
+                    Debug::log(LOG, "Rule minsize failed, rule: %s -> %s", r.szRule.c_str(), r.szValue.c_str());
+                }
             } else if (r.szRule.find("move") == 0) {
                 try {
                     const auto VALUE = r.szRule.substr(r.szRule.find(" ") + 1);