diff --git a/Makefile b/Makefile
index b98bd83..cd7a691 100755
--- a/Makefile
+++ b/Makefile
@@ -196,9 +196,13 @@ else ifeq ($(CHAIN),flare_coston)
 APP_LOAD_PARAMS += --path "44'/554'" --path "44'/60'"
 DEFINES += CHAINID_UPCASE=\"FLARE\" CHAINID_COINNAME=\"FLR\" CHAIN_KIND=CHAIN_KIND_FLARE CHAIN_ID=16
 APPNAME = "Flare Coston"
+else ifeq ($(CHAIN),theta)
+APP_LOAD_PARAMS += --path "44'/500'"
+DEFINES += CHAINID_UPCASE=\"THETA\" CHAINID_COINNAME=\"THETA\" CHAIN_KIND=CHAIN_KIND_THETA CHAIN_ID=500
+APPNAME = "Theta"
 else
 ifeq ($(filter clean,$(MAKECMDGOALS)),)
-$(error Unsupported CHAIN - use ethereum, ropsten, ethereum_classic, expanse, poa, artis_sigma1, artis_tau1, rsk, rsk_testnet, ubiq, wanchain, kusd, musicoin, pirl, akroma, atheios, callisto, ethersocial, ellaism, ether1, ethergem, gochain, mix, reosc, hpb, tomochain, tobalaba, dexon, volta, ewc, webchain, thundercore, flare, flare_coston)
+$(error Unsupported CHAIN - use ethereum, ropsten, ethereum_classic, expanse, poa, artis_sigma1, artis_tau1, rsk, rsk_testnet, ubiq, wanchain, kusd, musicoin, pirl, akroma, atheios, callisto, ethersocial, ellaism, ether1, ethergem, gochain, mix, reosc, hpb, tomochain, tobalaba, dexon, volta, ewc, webchain, thundercore, flare, flare_coston, theta)
 endif
 endif
 
@@ -334,4 +338,4 @@ include $(BOLOS_SDK)/Makefile.rules
 dep/%.d: %.c Makefile
 
 listvariants:
-	@echo VARIANTS CHAIN ethereum ropsten ethereum_classic expanse poa rsk rsk_testnet ubiq wanchain pirl akroma atheios callisto ethersocial ether1 gochain musicoin ethergem mix ellaism reosc hpb tomochain dexon volta ewc thundercore flare flare_coston
+	@echo VARIANTS CHAIN ethereum ropsten ethereum_classic expanse poa rsk rsk_testnet ubiq wanchain pirl akroma atheios callisto ethersocial ether1 gochain musicoin ethergem mix ellaism reosc hpb tomochain dexon volta ewc thundercore flare flare_coston theta
diff --git a/icons/blue_app_theta.gif b/icons/blue_app_theta.gif
new file mode 100644
index 0000000..5056f1b
Binary files /dev/null and b/icons/blue_app_theta.gif differ
diff --git a/icons/nanos_app_theta.gif b/icons/nanos_app_theta.gif
new file mode 100644
index 0000000..a265a49
Binary files /dev/null and b/icons/nanos_app_theta.gif differ
diff --git a/icons/nanox_app_theta.gif b/icons/nanox_app_theta.gif
new file mode 100644
index 0000000..e968dcf
Binary files /dev/null and b/icons/nanox_app_theta.gif differ
diff --git a/src/chainConfig.h b/src/chainConfig.h
index 27b4845..4cbd5ab 100644
--- a/src/chainConfig.h
+++ b/src/chainConfig.h
@@ -53,7 +53,8 @@ typedef enum chain_kind_e {
     CHAIN_KIND_ARTIS_TAU1,
     CHAIN_KIND_WEBCHAIN,
     CHAIN_KIND_THUNDERCORE,
-    CHAIN_KIND_FLARE
+    CHAIN_KIND_FLARE,
+    CHAIN_KIND_THETA
 } chain_kind_t;
 
 typedef struct chain_config_s {
diff --git a/src/main.c b/src/main.c
index 0151db3..dd4e34d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -265,6 +265,9 @@ tokenDefinition_t *getKnownToken(uint8_t *contractAddress) {
         case CHAIN_KIND_FLARE:
             numTokens = NUM_TOKENS_FLARE;
             break;
+        case CHAIN_KIND_THETA:
+            numTokens = NUM_TOKENS_THETA;
+            break;
     }
     for (i = 0; i < numTokens; i++) {
         switch (chainConfig->kind) {
@@ -361,6 +364,9 @@ tokenDefinition_t *getKnownToken(uint8_t *contractAddress) {
             case CHAIN_KIND_FLARE:
                 currentToken = (tokenDefinition_t *) PIC(&TOKENS_FLARE[i]);
                 break
+            case CHAIN_KIND_THETA:
+                currentToken = (tokenDefinition_t *) PIC(&TOKENS_THETA[i]);
+                break;
         }
         if (memcmp(currentToken->address, tmpContent.txContent.destination, 20) == 0) {
             return currentToken;
diff --git a/src/tokens.c b/src/tokens.c
index c1a5b49..c524a3a 100644
--- a/src/tokens.c
+++ b/src/tokens.c
@@ -4564,4 +4564,6 @@ const tokenDefinition_t const TOKENS_THUNDERCORE[NUM_TOKENS_THUNDERCORE] = {};
 
 const tokenDefinition_t const TOKENS_FLARE[NUM_TOKENS_FLARE] = {};
 
+const tokenDefinition_t const TOKENS_THETA[NUM_TOKENS_THETA] = {};
+
 #endif
diff --git a/src/tokens.h b/src/tokens.h
index 31ea004..d76f824 100644
--- a/src/tokens.h
+++ b/src/tokens.h
@@ -72,6 +72,7 @@ extern tokenDefinition_t const TOKENS_EXTRA[NUM_TOKENS_EXTRA];
 #define NUM_TOKENS_WEBCHAIN         0
 #define NUM_TOKENS_THUNDERCORE      0
 #define NUM_TOKENS_FLARE            0
+#define NUM_TOKENS_THETA            0
 
 extern tokenDefinition_t const TOKENS_AKROMA[NUM_TOKENS_AKROMA];
 extern tokenDefinition_t const TOKENS_ELLAISM[NUM_TOKENS_ELLAISM];
@@ -104,6 +105,7 @@ extern tokenDefinition_t const TOKENS_ARTIS_TAU1[NUM_TOKENS_ARTIS_TAU1];
 extern tokenDefinition_t const TOKENS_WEBCHAIN[NUM_TOKENS_WEBCHAIN];
 extern tokenDefinition_t const TOKENS_THUNDERCORE[NUM_TOKENS_THUNDERCORE];
 extern tokenDefinition_t const TOKENS_FLARE[NUM_TOKENS_FLARE];
+extern tokenDefinition_t const TOKENS_THETA[NUM_TOKENS_THETA];
 
 #endif /* HAVE_TOKENS_LIST */