diff --git a/src/actions/transformations/lower_case.h b/src/actions/transformations/lower_case.h
index 901333d4..41e81761 100644
--- a/src/actions/transformations/lower_case.h
+++ b/src/actions/transformations/lower_case.h
@@ -29,24 +29,6 @@ class Transaction;
 namespace actions {
 namespace transformations {
 
-class LowerCaseInstantCache :
-    public std::unordered_map<std::string, std::string> {
- public:
-    static LowerCaseInstantCache& getInstance() {
-        static LowerCaseInstantCache instance;
-        return instance;
-    }
-
-    void cache(const std::string& value, const std::string& out) {
-        emplace(value, out);
-        if (size() > 100) {
-            erase(begin());
-        }
-    }
- private:
-    LowerCaseInstantCache() {}
-};
-
 
 class LowerCase : public Transformation {
  public:
diff --git a/src/actions/transformations/url_decode.cc b/src/actions/transformations/url_decode.cc
index 8ed788a2..82706d7e 100644
--- a/src/actions/transformations/url_decode.cc
+++ b/src/actions/transformations/url_decode.cc
@@ -43,10 +43,6 @@ std::string UrlDecode::evaluate(std::string value,
     int invalid_count;
     int changed;
 
-    if (UrlDecodeInstantCache::getInstance().count(value) > 0) {
-        return UrlDecodeInstantCache::getInstance().at(value);
-    }
-
     val = (unsigned char *) malloc(sizeof(char) * value.size() + 1);
     memcpy(val, value.c_str(), value.size() + 1);
     val[value.size()] = '\0';
@@ -59,8 +55,6 @@ std::string UrlDecode::evaluate(std::string value,
 
     free(val);
 
-    UrlDecodeInstantCache::getInstance().cache(value, out);
-
     return out;
 }
 
diff --git a/src/actions/transformations/url_decode.h b/src/actions/transformations/url_decode.h
index eda1e3b9..9777153b 100644
--- a/src/actions/transformations/url_decode.h
+++ b/src/actions/transformations/url_decode.h
@@ -29,24 +29,6 @@ class Transaction;
 namespace actions {
 namespace transformations {
 
-class UrlDecodeInstantCache :
-    public std::unordered_map<std::string, std::string> {
- public:
-    static UrlDecodeInstantCache& getInstance() {
-        static UrlDecodeInstantCache instance;
-        return instance;
-    }
-
-    void cache(const std::string& value, const std::string& out) {
-        emplace(value, out);
-        if (size() > 500) {
-            erase(begin());
-        }
-    }
- private:
-    UrlDecodeInstantCache() {}
-};
-
 
 class UrlDecode : public Transformation {
  public: